/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=SHALLOWEST --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-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:13:54,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:13:54,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:13:54,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:13:54,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:13:54,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:13:54,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:13:54,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:13:54,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:13:54,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:13:54,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:13:54,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:13:54,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:13:54,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:13:54,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:13:54,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:13:54,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:13:54,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:13:54,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:13:54,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:13:54,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:13:54,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:13:54,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:13:54,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:13:54,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:13:54,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:13:54,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:13:54,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:13:54,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:13:54,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:13:54,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:13:54,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:13:54,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:13:54,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:13:54,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:13:54,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:13:54,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:13:54,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:13:54,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:13:54,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:13:54,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:13:54,597 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 [2020-10-26 19:13:54,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:13:54,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:13:54,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:13:54,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:13:54,671 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:13:54,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:13:54,671 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:13:54,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:13:54,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:13:54,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:13:54,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:13:54,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:13:54,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:13:54,673 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:13:54,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:13:54,673 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:13:54,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:13:54,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:13:54,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:13:54,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:13:54,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:13:54,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:54,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:13:54,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:13:54,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:13:54,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:13:54,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:13:54,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:13:54,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:13:54,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:13:55,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:13:55,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:13:55,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:13:55,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:13:55,113 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:13:55,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2020-10-26 19:13:55,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c9c734af/9f621f80db144d9aa6b25a7ecaf06809/FLAGddf208c88 [2020-10-26 19:13:55,949 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:13:55,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2020-10-26 19:13:55,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c9c734af/9f621f80db144d9aa6b25a7ecaf06809/FLAGddf208c88 [2020-10-26 19:13:56,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c9c734af/9f621f80db144d9aa6b25a7ecaf06809 [2020-10-26 19:13:56,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:13:56,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:13:56,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:56,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:13:56,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:13:56,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a624960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56, skipping insertion in model container [2020-10-26 19:13:56,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:13:56,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:13:56,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:56,582 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:13:56,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:56,661 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:13:56,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56 WrapperNode [2020-10-26 19:13:56,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:56,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:13:56,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:13:56,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:13:56,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (1/1) ... [2020-10-26 19:13:56,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:13:56,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:13:56,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:13:56,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:13:56,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (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 [2020-10-26 19:13:56,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:13:56,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:13:56,831 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:13:56,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:13:56,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:13:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:13:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:13:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:13:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:13:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:13:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:13:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:13:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:13:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:13:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:13:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:13:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:13:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:13:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:13:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:13:57,398 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:13:57,399 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:13:57,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:57 BoogieIcfgContainer [2020-10-26 19:13:57,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:13:57,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:13:57,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:13:57,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:13:57,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:13:56" (1/3) ... [2020-10-26 19:13:57,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67100a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:57, skipping insertion in model container [2020-10-26 19:13:57,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:56" (2/3) ... [2020-10-26 19:13:57,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67100a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:57, skipping insertion in model container [2020-10-26 19:13:57,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:57" (3/3) ... [2020-10-26 19:13:57,411 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2020-10-26 19:13:57,426 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:13:57,433 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:13:57,450 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:13:57,480 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:13:57,480 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:13:57,481 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:13:57,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:13:57,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:13:57,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:13:57,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:13:57,482 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:13:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:13:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:13:57,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:57,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:57,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1780932098, now seen corresponding path program 1 times [2020-10-26 19:13:57,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:57,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355222934] [2020-10-26 19:13:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:13:57,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:57,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 19:13:57,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:57,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:13:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:58,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:58,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:58,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355222934] [2020-10-26 19:13:58,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:58,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:13:58,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689188306] [2020-10-26 19:13:58,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:13:58,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:58,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:13:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:58,095 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-26 19:13:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:58,284 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2020-10-26 19:13:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:13:58,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:13:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:58,296 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:13:58,297 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:13:58,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:13:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 19:13:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:13:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-26 19:13:58,351 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2020-10-26 19:13:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:58,352 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-26 19:13:58,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:13:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-26 19:13:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:13:58,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:58,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:58,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:13:58,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386919, now seen corresponding path program 1 times [2020-10-26 19:13:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:58,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810524093] [2020-10-26 19:13:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:13:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-26 19:13:58,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:13:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:13:58,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:58,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:58,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:58,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:58,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:58,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:58,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:58,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:58,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:58,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810524093] [2020-10-26 19:13:58,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:58,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:13:58,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616284555] [2020-10-26 19:13:58,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:13:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:13:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:58,701 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2020-10-26 19:13:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:58,804 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-26 19:13:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:13:58,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:13:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:58,806 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:13:58,806 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:13:58,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:13:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:13:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:13:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-26 19:13:58,818 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2020-10-26 19:13:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:58,818 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-26 19:13:58,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:13:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-26 19:13:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:13:58,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:58,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:58,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:13:58,820 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -372680059, now seen corresponding path program 1 times [2020-10-26 19:13:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:58,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143782708] [2020-10-26 19:13:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:58,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:13:59,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:59,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 19:13:59,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:13:59,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:59,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:59,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:59,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:59,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:13:59,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:59,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143782708] [2020-10-26 19:13:59,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:59,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:13:59,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471584139] [2020-10-26 19:13:59,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:13:59,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:13:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:59,105 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2020-10-26 19:13:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:59,208 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-26 19:13:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:13:59,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:13:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:59,210 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:13:59,210 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:13:59,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:13:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:13:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:13:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-26 19:13:59,220 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2020-10-26 19:13:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:59,221 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-26 19:13:59,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:13:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-26 19:13:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:13:59,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:59,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:59,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:13:59,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash -160234397, now seen corresponding path program 2 times [2020-10-26 19:13:59,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:59,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455142344] [2020-10-26 19:13:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:13:59,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:59,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-26 19:13:59,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:59,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:59,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:13:59,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:59,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:59,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:59,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:59,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:59,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:59,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:59,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455142344] [2020-10-26 19:13:59,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:59,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:13:59,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442538717] [2020-10-26 19:13:59,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:59,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:59,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:59,558 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-26 19:13:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:59,702 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-26 19:13:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:59,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:13:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:59,704 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:13:59,704 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:13:59,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:13:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:13:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:13:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-26 19:13:59,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2020-10-26 19:13:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:59,715 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-26 19:13:59,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-26 19:13:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:13:59,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:59,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:59,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:13:59,717 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2136583873, now seen corresponding path program 3 times [2020-10-26 19:13:59,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:59,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447817720] [2020-10-26 19:13:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:14:00,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:00,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-26 19:14:00,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:14:00,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:00,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:14:00,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:00,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:00,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:00,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:00,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:00,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:14:00,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447817720] [2020-10-26 19:14:00,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:14:00,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:14:00,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170569494] [2020-10-26 19:14:00,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:14:00,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:14:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:14:00,095 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-10-26 19:14:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:00,183 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-10-26 19:14:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:14:00,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-26 19:14:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:00,184 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:14:00,185 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:14:00,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:14:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:14:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-26 19:14:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:14:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-26 19:14:00,193 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 23 [2020-10-26 19:14:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:00,194 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-26 19:14:00,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:14:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-26 19:14:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:14:00,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:00,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:00,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:14:00,195 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:00,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1671493751, now seen corresponding path program 1 times [2020-10-26 19:14:00,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:00,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358243504] [2020-10-26 19:14:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:00,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:14:00,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:00,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-26 19:14:00,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:14:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:14:00,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:00,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:00,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:00,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:00,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:00,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:00,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:00,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:00,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:14:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358243504] [2020-10-26 19:14:00,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:00,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:14:00,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009273767] [2020-10-26 19:14:00,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:14:00,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:00,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:14:00,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:00,974 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-10-26 19:14:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:01,089 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-10-26 19:14:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:14:01,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-26 19:14:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:01,091 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:14:01,091 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:14:01,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:14:01,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:14:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:14:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-26 19:14:01,101 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 26 [2020-10-26 19:14:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:01,101 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-26 19:14:01,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:14:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-26 19:14:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:14:01,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:01,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:01,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:14:01,103 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:01,104 INFO L82 PathProgramCache]: Analyzing trace with hash 851187929, now seen corresponding path program 2 times [2020-10-26 19:14:01,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:01,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450862463] [2020-10-26 19:14:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:01,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:02,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:14:02,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1156 [2020-10-26 19:14:02,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:14:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:14:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:02,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:02,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:02,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:02,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:02,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:02,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:02,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:02,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:02,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:14:02,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450862463] [2020-10-26 19:14:02,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:02,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:14:02,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149151534] [2020-10-26 19:14:02,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:14:02,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:14:02,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:02,374 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-10-26 19:14:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:02,476 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-26 19:14:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:14:02,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-26 19:14:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:02,477 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:14:02,477 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:14:02,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:14:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:14:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:14:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-26 19:14:02,485 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 28 [2020-10-26 19:14:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:02,486 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-26 19:14:02,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:14:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-26 19:14:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:14:02,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:02,487 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:02,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:14:02,487 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1483691845, now seen corresponding path program 3 times [2020-10-26 19:14:02,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:02,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447634156] [2020-10-26 19:14:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:02,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:04,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:04,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:14:04,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:04,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2010 [2020-10-26 19:14:04,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:14:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:04,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:14:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:04,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:04,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:04,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:04,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:04,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:04,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:14:04,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447634156] [2020-10-26 19:14:04,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:04,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:14:04,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857387648] [2020-10-26 19:14:04,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:14:04,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:04,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:14:04,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:14:04,582 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2020-10-26 19:14:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:04,669 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-26 19:14:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:14:04,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-26 19:14:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:04,671 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:14:04,671 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:14:04,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:14:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:14:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-26 19:14:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:14:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-26 19:14:04,678 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 30 [2020-10-26 19:14:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:04,678 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-26 19:14:04,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:14:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-26 19:14:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:14:04,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:04,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:04,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:14:04,680 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash 961348669, now seen corresponding path program 4 times [2020-10-26 19:14:04,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:04,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782212075] [2020-10-26 19:14:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:04,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:14:07,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2354 [2020-10-26 19:14:07,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:14:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:14:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:07,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:07,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:07,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:07,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:07,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:14:07,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782212075] [2020-10-26 19:14:07,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:07,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:14:07,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229131330] [2020-10-26 19:14:07,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:14:07,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:07,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:14:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:07,159 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 9 states. [2020-10-26 19:14:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:07,302 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-26 19:14:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:14:07,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-26 19:14:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:07,305 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:14:07,305 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:14:07,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:14:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:14:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:14:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-26 19:14:07,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 33 [2020-10-26 19:14:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:07,321 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-26 19:14:07,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:14:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-26 19:14:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:14:07,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:07,326 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:07,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:14:07,327 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 799084955, now seen corresponding path program 5 times [2020-10-26 19:14:07,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:07,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568063750] [2020-10-26 19:14:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:14:10,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:10,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2659 [2020-10-26 19:14:10,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:14:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:14:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:10,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:10,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:10,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:14:10,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568063750] [2020-10-26 19:14:10,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:10,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:14:10,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885653382] [2020-10-26 19:14:10,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:14:10,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:10,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:14:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:14:10,106 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 6 states. [2020-10-26 19:14:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:10,207 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-26 19:14:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:14:10,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-26 19:14:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:10,208 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:14:10,208 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:14:10,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:14:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:14:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-26 19:14:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:14:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-26 19:14:10,222 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2020-10-26 19:14:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:10,225 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-26 19:14:10,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:14:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-26 19:14:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:14:10,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:10,227 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:10,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:14:10,227 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:10,227 INFO L82 PathProgramCache]: Analyzing trace with hash 652832605, now seen corresponding path program 6 times [2020-10-26 19:14:10,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:10,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278476842] [2020-10-26 19:14:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:10,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:14:14,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:14,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4327 [2020-10-26 19:14:14,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:14:14,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:14:14,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:14,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:14,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:14,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:14,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:14:14,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:14,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:14,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:14,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:14:14,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278476842] [2020-10-26 19:14:14,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:14,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:14:14,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780665013] [2020-10-26 19:14:14,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:14:14,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:14:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:14,709 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 10 states. [2020-10-26 19:14:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:14,842 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-10-26 19:14:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:14:14,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-26 19:14:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:14,844 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:14:14,844 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:14:14,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:14:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-26 19:14:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:14:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-26 19:14:14,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 38 [2020-10-26 19:14:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:14,852 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-26 19:14:14,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:14:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-26 19:14:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:14:14,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:14,854 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:14,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:14:14,854 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:14,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:14,855 INFO L82 PathProgramCache]: Analyzing trace with hash -730002241, now seen corresponding path program 7 times [2020-10-26 19:14:14,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:14,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954958065] [2020-10-26 19:14:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:14,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:19,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:19,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:14:19,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:19,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4899 [2020-10-26 19:14:19,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:19,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:14:19,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:19,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:14:19,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:19,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:19,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:19,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:19,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:19,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:14:19,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:19,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:19,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:19,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:19,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:14:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 19:14:19,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954958065] [2020-10-26 19:14:19,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:19,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:14:19,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916159039] [2020-10-26 19:14:19,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:14:19,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:19,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:14:19,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:19,876 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 7 states. [2020-10-26 19:14:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:19,970 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-26 19:14:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:14:19,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-26 19:14:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:19,971 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:14:19,971 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:14:19,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:14:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-26 19:14:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:14:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-26 19:14:19,981 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 40 [2020-10-26 19:14:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:19,981 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-26 19:14:19,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:14:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-26 19:14:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:14:19,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:19,986 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:19,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:14:19,986 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 39317945, now seen corresponding path program 8 times [2020-10-26 19:14:19,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:19,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245254220] [2020-10-26 19:14:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:20,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:20,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:25,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:14:25,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:25,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:14:25,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:14:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:14:25,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:25,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:25,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:25,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:25,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:25,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:14:25,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245254220] [2020-10-26 19:14:25,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:25,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:14:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33085663] [2020-10-26 19:14:25,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:14:25,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:14:25,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:25,154 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 11 states. [2020-10-26 19:14:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:25,260 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2020-10-26 19:14:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:14:25,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-26 19:14:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:25,262 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:14:25,262 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:14:25,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:14:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:14:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:14:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-26 19:14:25,269 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 43 [2020-10-26 19:14:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:25,269 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-26 19:14:25,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:14:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-26 19:14:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:14:25,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:25,271 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:25,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:14:25,271 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:25,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1756979607, now seen corresponding path program 9 times [2020-10-26 19:14:25,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:25,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143587166] [2020-10-26 19:14:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:25,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:30,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:14:30,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:30,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:14:30,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:14:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:30,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:14:30,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:30,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:30,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:30,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:30,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:30,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:30,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:14:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143587166] [2020-10-26 19:14:30,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:30,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:14:30,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521204882] [2020-10-26 19:14:30,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:14:30,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:30,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:14:30,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:30,451 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 12 states. [2020-10-26 19:14:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:30,622 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-10-26 19:14:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:14:30,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-26 19:14:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:30,625 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:14:30,625 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:14:30,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:14:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:14:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:14:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-26 19:14:30,639 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 45 [2020-10-26 19:14:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:30,639 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-26 19:14:30,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:14:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-26 19:14:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:14:30,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:30,641 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:30,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:14:30,641 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:30,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1132572171, now seen corresponding path program 10 times [2020-10-26 19:14:30,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:30,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249383141] [2020-10-26 19:14:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:35,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:35,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:14:35,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:35,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:14:35,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:35,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:14:35,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:35,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:14:35,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:35,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:35,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:35,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:35,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:35,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:35,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:35,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:35,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:14:35,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249383141] [2020-10-26 19:14:35,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:35,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:14:35,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644116147] [2020-10-26 19:14:35,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:14:35,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:35,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:14:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:35,852 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2020-10-26 19:14:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:36,020 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-10-26 19:14:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:14:36,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-26 19:14:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:36,021 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:14:36,021 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:14:36,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:14:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:14:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:14:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-26 19:14:36,029 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 47 [2020-10-26 19:14:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:36,030 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-26 19:14:36,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:14:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-26 19:14:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:14:36,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:36,031 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:36,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:14:36,031 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash 852009683, now seen corresponding path program 11 times [2020-10-26 19:14:36,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:36,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43744164] [2020-10-26 19:14:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:36,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:36,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:36,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:41,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:14:41,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:41,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:14:41,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:41,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:14:41,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:41,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:14:41,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:41,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:41,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:41,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:41,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:41,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 19:14:41,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43744164] [2020-10-26 19:14:41,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:41,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:14:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167919566] [2020-10-26 19:14:41,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:14:41,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:14:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:41,167 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 8 states. [2020-10-26 19:14:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:41,283 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2020-10-26 19:14:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:14:41,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-26 19:14:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:41,285 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:14:41,285 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:14:41,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:14:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:14:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:14:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-26 19:14:41,293 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 49 [2020-10-26 19:14:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:41,294 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-26 19:14:41,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:14:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-26 19:14:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:14:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:41,296 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:41,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:14:41,296 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1080406821, now seen corresponding path program 12 times [2020-10-26 19:14:41,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:41,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364803906] [2020-10-26 19:14:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:41,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:46,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:14:46,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:14:46,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:14:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:14:46,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:46,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:46,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:46,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:46,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:46,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:46,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:46,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364803906] [2020-10-26 19:14:46,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:46,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:14:46,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613629025] [2020-10-26 19:14:46,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:14:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:14:46,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:46,556 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2020-10-26 19:14:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:46,747 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-10-26 19:14:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:14:46,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-26 19:14:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:46,749 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:14:46,749 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:14:46,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:14:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:14:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:14:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-26 19:14:46,763 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 52 [2020-10-26 19:14:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:46,764 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-26 19:14:46,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:14:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-26 19:14:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:14:46,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:46,765 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:46,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:14:46,768 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:46,768 INFO L82 PathProgramCache]: Analyzing trace with hash 652295431, now seen corresponding path program 13 times [2020-10-26 19:14:46,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:46,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225474390] [2020-10-26 19:14:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:51,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:14:51,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:51,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:14:51,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:51,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:14:51,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:51,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:14:51,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:51,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:51,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:51,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:51,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:51,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225474390] [2020-10-26 19:14:51,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:52,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:14:52,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148726557] [2020-10-26 19:14:52,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:14:52,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:52,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:14:52,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:52,011 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 15 states. [2020-10-26 19:14:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:52,200 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-10-26 19:14:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:14:52,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-10-26 19:14:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:52,202 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:14:52,202 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:14:52,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:14:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 19:14:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:14:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-26 19:14:52,210 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 54 [2020-10-26 19:14:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:52,211 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-26 19:14:52,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:14:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-26 19:14:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:14:52,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:52,212 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:52,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:14:52,213 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:52,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1554110057, now seen corresponding path program 14 times [2020-10-26 19:14:52,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:52,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529531249] [2020-10-26 19:14:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:52,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:52,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:57,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:14:57,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:57,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:57,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:57,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:57,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:57,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:57,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:57,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:57,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:57,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:57,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:57,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:57,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529531249] [2020-10-26 19:14:57,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:57,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:14:57,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48550075] [2020-10-26 19:14:57,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:14:57,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:14:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:57,452 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 16 states. [2020-10-26 19:14:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:57,636 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-26 19:14:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:14:57,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-26 19:14:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:57,637 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:14:57,637 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:14:57,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:14:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:14:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:14:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-26 19:14:57,646 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 56 [2020-10-26 19:14:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:57,646 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-26 19:14:57,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:14:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-26 19:14:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:14:57,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:57,647 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:57,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:14:57,647 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:57,648 INFO L82 PathProgramCache]: Analyzing trace with hash 614571851, now seen corresponding path program 15 times [2020-10-26 19:14:57,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:57,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450981521] [2020-10-26 19:14:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:57,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:57,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:57,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:02,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:15:02,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:02,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:15:02,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:02,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:15:02,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:02,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:15:02,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:02,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:02,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:02,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:02,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:02,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:02,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-26 19:15:02,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450981521] [2020-10-26 19:15:02,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:02,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:15:02,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164162445] [2020-10-26 19:15:02,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:15:02,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:02,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:15:02,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:15:02,788 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 9 states. [2020-10-26 19:15:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:02,910 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2020-10-26 19:15:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:15:02,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-26 19:15:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:02,912 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:15:02,912 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:15:02,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:15:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:15:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-26 19:15:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:15:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-26 19:15:02,921 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 58 [2020-10-26 19:15:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:02,921 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-26 19:15:02,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:15:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-26 19:15:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:15:02,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:02,927 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:02,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:15:02,928 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1381090221, now seen corresponding path program 16 times [2020-10-26 19:15:02,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:02,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765341173] [2020-10-26 19:15:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:02,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:07,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:15:07,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:07,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:15:07,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:07,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:15:07,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:07,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:15:07,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:08,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:08,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:08,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:08,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:08,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:15:08,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765341173] [2020-10-26 19:15:08,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:08,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:15:08,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12019941] [2020-10-26 19:15:08,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:15:08,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:15:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:15:08,236 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 17 states. [2020-10-26 19:15:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:08,453 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-10-26 19:15:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:15:08,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-26 19:15:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:08,454 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:15:08,455 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:15:08,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:15:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:15:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:15:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:15:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-26 19:15:08,467 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 61 [2020-10-26 19:15:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:08,468 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-26 19:15:08,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:15:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-26 19:15:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:15:08,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:08,469 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:08,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:15:08,469 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2090219531, now seen corresponding path program 17 times [2020-10-26 19:15:08,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:08,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302113445] [2020-10-26 19:15:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:13,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:15:13,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:13,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:15:13,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:15:13,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:13,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 19:15:13,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:13,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:13,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:13,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:13,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:13,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:13,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:13,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-26 19:15:13,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302113445] [2020-10-26 19:15:13,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:13,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:15:13,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509009767] [2020-10-26 19:15:13,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:15:13,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:15:13,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:15:13,624 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 10 states. [2020-10-26 19:15:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:13,826 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2020-10-26 19:15:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:15:13,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-26 19:15:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:13,828 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:15:13,828 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:15:13,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:15:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:15:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-10-26 19:15:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:15:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-10-26 19:15:13,836 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 63 [2020-10-26 19:15:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:13,837 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-10-26 19:15:13,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:15:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-10-26 19:15:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:15:13,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:13,838 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:13,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:15:13,841 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash -884116755, now seen corresponding path program 18 times [2020-10-26 19:15:13,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:13,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113654426] [2020-10-26 19:15:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:13,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:18,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:15:18,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:18,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:15:18,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:18,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:15:18,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:15:18,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:19,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:19,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:19,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:19,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:19,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:19,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:15:19,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113654426] [2020-10-26 19:15:19,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:19,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:15:19,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620306554] [2020-10-26 19:15:19,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:15:19,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:15:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:15:19,148 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 18 states. [2020-10-26 19:15:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:19,352 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2020-10-26 19:15:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:15:19,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-10-26 19:15:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:19,354 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:15:19,354 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:15:19,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:15:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:15:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-26 19:15:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:15:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-26 19:15:19,360 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 66 [2020-10-26 19:15:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:19,360 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-26 19:15:19,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:15:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-26 19:15:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:15:19,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:19,361 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:19,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:15:19,361 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash -31913649, now seen corresponding path program 19 times [2020-10-26 19:15:19,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:19,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657803724] [2020-10-26 19:15:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:19,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:20,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:24,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:15:24,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:15:24,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:15:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:15:24,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:24,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:24,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:24,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:15:24,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657803724] [2020-10-26 19:15:24,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:24,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:15:24,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666047360] [2020-10-26 19:15:24,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:15:24,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:15:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:15:24,514 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 11 states. [2020-10-26 19:15:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:24,675 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2020-10-26 19:15:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:15:24,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-26 19:15:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:24,677 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:15:24,677 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:15:24,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:15:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:15:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-26 19:15:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:15:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-10-26 19:15:24,684 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 68 [2020-10-26 19:15:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:24,684 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-10-26 19:15:24,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:15:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-10-26 19:15:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:15:24,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:24,685 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:24,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:15:24,685 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 564914985, now seen corresponding path program 20 times [2020-10-26 19:15:24,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:24,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678273367] [2020-10-26 19:15:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:24,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:29,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:15:29,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:29,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:29,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:29,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:15:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678273367] [2020-10-26 19:15:29,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:29,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:15:29,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958066592] [2020-10-26 19:15:29,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:15:29,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:15:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:15:29,862 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 12 states. [2020-10-26 19:15:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:30,016 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2020-10-26 19:15:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:15:30,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-26 19:15:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:30,018 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:15:30,018 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:15:30,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:15:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:15:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-26 19:15:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:15:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-10-26 19:15:30,023 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 71 [2020-10-26 19:15:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:30,024 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-10-26 19:15:30,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:15:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-10-26 19:15:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:15:30,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:30,024 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:30,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:15:30,025 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:30,025 INFO L82 PathProgramCache]: Analyzing trace with hash -477854961, now seen corresponding path program 21 times [2020-10-26 19:15:30,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:30,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262603779] [2020-10-26 19:15:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:30,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:35,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:35,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:15:35,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:35,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:15:35,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:15:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:15:35,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:35,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:35,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:35,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:15:35,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262603779] [2020-10-26 19:15:35,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:35,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:15:35,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814354409] [2020-10-26 19:15:35,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:15:35,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:15:35,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:15:35,238 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 13 states. [2020-10-26 19:15:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:35,403 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-26 19:15:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:15:35,403 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-10-26 19:15:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:35,404 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:15:35,404 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:15:35,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:15:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:15:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-26 19:15:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:15:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-26 19:15:35,411 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 74 [2020-10-26 19:15:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:35,411 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-26 19:15:35,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:15:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-26 19:15:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:15:35,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:35,412 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:35,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:15:35,413 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash -138864279, now seen corresponding path program 22 times [2020-10-26 19:15:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:35,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702210755] [2020-10-26 19:15:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:35,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:35,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:35,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:40,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:40,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:15:40,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:40,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:15:40,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:40,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:15:40,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:40,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:15:40,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:40,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:40,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:40,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:40,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:40,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:40,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:40,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:40,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:40,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:40,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:15:40,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702210755] [2020-10-26 19:15:40,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:40,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:15:40,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480863457] [2020-10-26 19:15:40,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:15:40,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:40,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:15:40,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:15:40,773 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2020-10-26 19:15:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:41,007 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2020-10-26 19:15:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:15:41,008 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-10-26 19:15:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:41,009 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:15:41,009 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:15:41,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:15:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:15:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:15:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:15:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2020-10-26 19:15:41,015 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 77 [2020-10-26 19:15:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2020-10-26 19:15:41,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:15:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2020-10-26 19:15:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:15:41,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:41,017 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:41,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:15:41,017 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1326116409, now seen corresponding path program 23 times [2020-10-26 19:15:41,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:41,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95056523] [2020-10-26 19:15:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:46,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:15:46,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95056523] [2020-10-26 19:15:46,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:46,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:15:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151032674] [2020-10-26 19:15:46,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:15:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:15:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:15:46,381 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 20 states. [2020-10-26 19:15:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:46,628 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2020-10-26 19:15:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:15:46,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-10-26 19:15:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:46,630 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:15:46,630 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:15:46,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:15:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:15:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:15:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:15:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-26 19:15:46,640 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 79 [2020-10-26 19:15:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:46,640 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-26 19:15:46,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:15:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-26 19:15:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:15:46,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:46,643 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:46,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:15:46,643 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:46,644 INFO L82 PathProgramCache]: Analyzing trace with hash 185887397, now seen corresponding path program 24 times [2020-10-26 19:15:46,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:46,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834623000] [2020-10-26 19:15:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:51,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:51,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:15:51,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:15:51,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:15:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:15:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:52,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:52,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:52,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:52,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:52,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:52,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:52,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:52,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:15:52,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834623000] [2020-10-26 19:15:52,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:52,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:15:52,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292950854] [2020-10-26 19:15:52,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:15:52,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:52,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:15:52,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:15:52,020 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 21 states. [2020-10-26 19:15:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:52,284 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2020-10-26 19:15:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:15:52,284 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2020-10-26 19:15:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:52,285 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:15:52,286 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:15:52,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:15:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:15:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:15:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:15:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2020-10-26 19:15:52,297 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 81 [2020-10-26 19:15:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:52,298 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2020-10-26 19:15:52,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:15:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2020-10-26 19:15:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:15:52,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:52,299 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:52,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:15:52,299 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:52,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1522598915, now seen corresponding path program 25 times [2020-10-26 19:15:52,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:52,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042912710] [2020-10-26 19:15:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:52,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:57,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:15:57,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:57,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:57,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:57,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:57,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:57,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:57,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:15:57,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042912710] [2020-10-26 19:15:57,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:57,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:15:57,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687725325] [2020-10-26 19:15:57,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:15:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:15:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:15:57,717 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand 22 states. [2020-10-26 19:15:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:57,895 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2020-10-26 19:15:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:15:57,896 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2020-10-26 19:15:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:57,897 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:15:57,898 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:15:57,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:15:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:15:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:15:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:15:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2020-10-26 19:15:57,904 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 83 [2020-10-26 19:15:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:57,905 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2020-10-26 19:15:57,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:15:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2020-10-26 19:15:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:15:57,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:57,906 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:57,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:15:57,906 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1907146209, now seen corresponding path program 26 times [2020-10-26 19:15:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:57,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774258316] [2020-10-26 19:15:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:57,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:57,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:59,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:02,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:02,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:16:02,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:02,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:16:02,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:02,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:16:02,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:02,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 19:16:02,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:03,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:03,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:03,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:03,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:03,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:16:03,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:03,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:03,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-26 19:16:03,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774258316] [2020-10-26 19:16:03,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:03,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:16:03,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58548198] [2020-10-26 19:16:03,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:16:03,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:03,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:16:03,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:16:03,146 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand 14 states. [2020-10-26 19:16:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:03,341 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-10-26 19:16:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:16:03,341 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-26 19:16:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:03,342 INFO L225 Difference]: With dead ends: 119 [2020-10-26 19:16:03,343 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:16:03,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:16:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:16:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:16:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:16:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2020-10-26 19:16:03,349 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 85 [2020-10-26 19:16:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:03,349 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2020-10-26 19:16:03,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:16:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2020-10-26 19:16:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:16:03,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:03,351 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:03,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:16:03,351 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash -212986537, now seen corresponding path program 27 times [2020-10-26 19:16:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:03,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791846557] [2020-10-26 19:16:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:03,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:05,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:08,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:08,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:16:08,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:08,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:16:08,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:08,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:16:08,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:08,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:16:08,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:08,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:08,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:08,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:08,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:08,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:16:08,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:08,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:08,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:08,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:08,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-26 19:16:08,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791846557] [2020-10-26 19:16:08,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:08,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:16:08,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815272670] [2020-10-26 19:16:08,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:16:08,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:16:08,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:16:08,776 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand 23 states. [2020-10-26 19:16:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:08,970 INFO L93 Difference]: Finished difference Result 154 states and 186 transitions. [2020-10-26 19:16:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:16:08,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 88 [2020-10-26 19:16:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:08,972 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:16:08,972 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:16:08,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:16:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:16:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-26 19:16:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:16:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-10-26 19:16:08,983 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 88 [2020-10-26 19:16:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:08,984 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-10-26 19:16:08,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:16:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-10-26 19:16:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:16:08,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:08,990 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:08,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:16:08,990 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:08,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:08,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1566452167, now seen corresponding path program 28 times [2020-10-26 19:16:08,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:08,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909091925] [2020-10-26 19:16:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:09,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:09,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:14,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:14,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:16:14,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:14,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:16:14,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:14,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:16:14,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:14,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:16:14,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:14,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:14,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:14,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-26 19:16:14,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909091925] [2020-10-26 19:16:14,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:14,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:16:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478927163] [2020-10-26 19:16:14,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:16:14,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:16:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:16:14,224 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 15 states. [2020-10-26 19:16:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:14,409 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2020-10-26 19:16:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:16:14,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2020-10-26 19:16:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:14,411 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:16:14,411 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:16:14,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:16:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:16:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-10-26 19:16:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:16:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2020-10-26 19:16:14,420 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 90 [2020-10-26 19:16:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:14,420 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2020-10-26 19:16:14,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:16:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2020-10-26 19:16:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:16:14,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:14,422 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:14,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:16:14,422 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 759823871, now seen corresponding path program 29 times [2020-10-26 19:16:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:14,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648753141] [2020-10-26 19:16:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:14,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:16:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:19,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:19,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:19,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:19,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:16:19,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648753141] [2020-10-26 19:16:19,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:19,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:16:19,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148318652] [2020-10-26 19:16:19,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:16:19,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:16:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:16:19,909 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand 24 states. [2020-10-26 19:16:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:20,200 INFO L93 Difference]: Finished difference Result 162 states and 196 transitions. [2020-10-26 19:16:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:16:20,200 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-10-26 19:16:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:20,202 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:16:20,202 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:16:20,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:16:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:16:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:16:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:16:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2020-10-26 19:16:20,218 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 93 [2020-10-26 19:16:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:20,218 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2020-10-26 19:16:20,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:16:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2020-10-26 19:16:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:16:20,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:20,220 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:20,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:16:20,220 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:20,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1039497821, now seen corresponding path program 30 times [2020-10-26 19:16:20,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:20,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490725377] [2020-10-26 19:16:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:25,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:16:25,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:25,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:25,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:25,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:25,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:25,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:25,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:25,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:25,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:25,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:25,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:25,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:16:25,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490725377] [2020-10-26 19:16:25,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:25,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:16:25,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225271926] [2020-10-26 19:16:25,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:16:25,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:16:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:16:25,777 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand 25 states. [2020-10-26 19:16:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:26,048 INFO L93 Difference]: Finished difference Result 164 states and 198 transitions. [2020-10-26 19:16:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:16:26,049 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-26 19:16:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:26,050 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:16:26,051 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:16:26,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:16:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:16:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:16:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:16:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2020-10-26 19:16:26,057 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 95 [2020-10-26 19:16:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:26,058 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2020-10-26 19:16:26,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:16:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2020-10-26 19:16:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:16:26,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:26,059 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:26,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:16:26,059 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash -776775877, now seen corresponding path program 31 times [2020-10-26 19:16:26,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:26,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183171456] [2020-10-26 19:16:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:26,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:31,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:31,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:16:31,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:31,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-26 19:16:31,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:31,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:16:31,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:31,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 19:16:31,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:31,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:31,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:31,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:31,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:31,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:31,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:31,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:31,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-26 19:16:31,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183171456] [2020-10-26 19:16:31,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:31,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:16:31,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215986473] [2020-10-26 19:16:31,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:16:31,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:31,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:16:31,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:16:31,422 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand 16 states. [2020-10-26 19:16:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:31,630 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-10-26 19:16:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:16:31,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-26 19:16:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:31,632 INFO L225 Difference]: With dead ends: 131 [2020-10-26 19:16:31,632 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:16:31,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:16:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:16:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:16:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:16:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-10-26 19:16:31,638 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 97 [2020-10-26 19:16:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:31,639 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-10-26 19:16:31,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:16:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-10-26 19:16:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:16:31,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:31,640 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:31,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:16:31,640 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1824668227, now seen corresponding path program 32 times [2020-10-26 19:16:31,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:31,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366292753] [2020-10-26 19:16:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:31,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:34,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:36,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:36,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:16:36,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:36,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:16:36,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:36,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:16:36,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:36,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:16:36,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:36,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:36,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:36,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:36,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:36,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:36,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:36,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:36,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-26 19:16:36,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366292753] [2020-10-26 19:16:36,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:36,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:16:36,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090530332] [2020-10-26 19:16:36,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:16:36,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:36,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:16:36,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:16:36,963 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 17 states. [2020-10-26 19:16:37,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:37,163 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2020-10-26 19:16:37,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:16:37,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 100 [2020-10-26 19:16:37,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:37,165 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:16:37,165 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:16:37,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:16:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:16:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-26 19:16:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:16:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2020-10-26 19:16:37,172 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 100 [2020-10-26 19:16:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:37,173 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2020-10-26 19:16:37,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:16:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2020-10-26 19:16:37,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:16:37,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:37,174 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:37,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:16:37,175 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash 531607547, now seen corresponding path program 33 times [2020-10-26 19:16:37,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:37,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726657348] [2020-10-26 19:16:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:37,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:37,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:39,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:42,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:16:42,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:42,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-26 19:16:42,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:16:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-26 19:16:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:42,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:42,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:42,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:42,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:42,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:42,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:42,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-26 19:16:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726657348] [2020-10-26 19:16:42,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:42,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:16:42,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869185373] [2020-10-26 19:16:42,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:16:42,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:16:42,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:16:42,557 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand 18 states. [2020-10-26 19:16:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:42,716 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2020-10-26 19:16:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:16:42,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2020-10-26 19:16:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:42,718 INFO L225 Difference]: With dead ends: 137 [2020-10-26 19:16:42,718 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:16:42,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:16:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:16:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-10-26 19:16:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:16:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2020-10-26 19:16:42,725 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 103 [2020-10-26 19:16:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:42,725 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2020-10-26 19:16:42,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:16:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2020-10-26 19:16:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:16:42,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:42,727 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:42,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:16:42,727 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:42,727 INFO L82 PathProgramCache]: Analyzing trace with hash -602295043, now seen corresponding path program 34 times [2020-10-26 19:16:42,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:42,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000689704] [2020-10-26 19:16:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:42,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:43,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:47,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:47,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:16:47,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:47,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:16:47,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:47,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:16:47,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:47,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:16:47,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:48,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:48,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:48,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:48,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:48,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:48,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:48,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:48,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:16:48,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000689704] [2020-10-26 19:16:48,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:48,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:16:48,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359564088] [2020-10-26 19:16:48,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:16:48,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:16:48,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:16:48,237 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand 26 states. [2020-10-26 19:16:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:48,459 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2020-10-26 19:16:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:16:48,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2020-10-26 19:16:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:48,461 INFO L225 Difference]: With dead ends: 184 [2020-10-26 19:16:48,461 INFO L226 Difference]: Without dead ends: 119 [2020-10-26 19:16:48,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:16:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-26 19:16:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-26 19:16:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:16:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 138 transitions. [2020-10-26 19:16:48,467 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 138 transitions. Word has length 106 [2020-10-26 19:16:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:48,467 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 138 transitions. [2020-10-26 19:16:48,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:16:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 138 transitions. [2020-10-26 19:16:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:16:48,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:48,468 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:48,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:16:48,469 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:48,469 INFO L82 PathProgramCache]: Analyzing trace with hash -697843361, now seen corresponding path program 35 times [2020-10-26 19:16:48,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:48,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420099312] [2020-10-26 19:16:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:48,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:53,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:53,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:16:53,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:53,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:16:53,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:16:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:16:53,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:54,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:54,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:54,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:54,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:54,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:54,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:54,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:16:54,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420099312] [2020-10-26 19:16:54,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:54,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:16:54,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818329998] [2020-10-26 19:16:54,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:16:54,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:54,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:16:54,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:16:54,084 INFO L87 Difference]: Start difference. First operand 118 states and 138 transitions. Second operand 27 states. [2020-10-26 19:16:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:54,254 INFO L93 Difference]: Finished difference Result 186 states and 226 transitions. [2020-10-26 19:16:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:16:54,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-26 19:16:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:54,256 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:16:54,256 INFO L226 Difference]: Without dead ends: 121 [2020-10-26 19:16:54,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:16:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-26 19:16:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-26 19:16:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:16:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-10-26 19:16:54,264 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 108 [2020-10-26 19:16:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:54,264 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-10-26 19:16:54,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:16:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-10-26 19:16:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:16:54,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:54,265 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:54,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:16:54,266 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1969503553, now seen corresponding path program 36 times [2020-10-26 19:16:54,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:54,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361718568] [2020-10-26 19:16:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:54,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:54,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:57,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:59,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:59,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:16:59,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:16:59,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-26 19:16:59,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:16:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:16:59,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:59,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:59,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:59,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:59,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:59,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:59,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:59,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:59,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:59,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:59,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-26 19:16:59,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361718568] [2020-10-26 19:16:59,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:59,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:16:59,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628734833] [2020-10-26 19:16:59,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:16:59,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:59,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:16:59,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:16:59,671 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 19 states. [2020-10-26 19:16:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:59,894 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2020-10-26 19:16:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:16:59,894 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 110 [2020-10-26 19:16:59,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:59,895 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:16:59,896 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:16:59,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:16:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:16:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-10-26 19:16:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:16:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2020-10-26 19:16:59,902 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 110 [2020-10-26 19:16:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:59,903 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2020-10-26 19:16:59,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:16:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2020-10-26 19:16:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:16:59,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:59,904 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:59,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:16:59,904 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2048776695, now seen corresponding path program 37 times [2020-10-26 19:16:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:59,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052725884] [2020-10-26 19:16:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:59,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:00,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:02,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:04,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 19:17:04,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:05,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:05,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:05,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:05,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:05,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:05,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:05,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:05,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:05,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:05,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-26 19:17:05,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052725884] [2020-10-26 19:17:05,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:05,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:17:05,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544496616] [2020-10-26 19:17:05,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:17:05,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:17:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:17:05,292 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand 20 states. [2020-10-26 19:17:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:05,488 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2020-10-26 19:17:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:17:05,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2020-10-26 19:17:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:05,490 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:17:05,490 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:17:05,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:17:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:17:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:17:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:17:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-10-26 19:17:05,498 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 113 [2020-10-26 19:17:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:05,499 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-10-26 19:17:05,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:17:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-10-26 19:17:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:17:05,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:05,500 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:05,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:17:05,500 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1442937217, now seen corresponding path program 38 times [2020-10-26 19:17:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:05,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967765164] [2020-10-26 19:17:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:05,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:05,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:05,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:10,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:17:10,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:11,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:11,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:11,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:11,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:11,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:11,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:11,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:17:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967765164] [2020-10-26 19:17:11,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:11,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:17:11,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229256290] [2020-10-26 19:17:11,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:17:11,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:11,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:17:11,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:17:11,291 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 28 states. [2020-10-26 19:17:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:11,511 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2020-10-26 19:17:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:17:11,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 116 [2020-10-26 19:17:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:11,513 INFO L225 Difference]: With dead ends: 200 [2020-10-26 19:17:11,513 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:17:11,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:17:11,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:17:11,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-26 19:17:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:17:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2020-10-26 19:17:11,522 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 116 [2020-10-26 19:17:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:11,522 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2020-10-26 19:17:11,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:17:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2020-10-26 19:17:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:17:11,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:11,523 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:11,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:17:11,523 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash -21171357, now seen corresponding path program 39 times [2020-10-26 19:17:11,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:11,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995173412] [2020-10-26 19:17:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:11,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:16,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:16,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:17:16,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:17:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-26 19:17:16,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:17:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:17:16,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:17,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:17,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:17,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:17,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:17,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:17,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:17,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:17:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995173412] [2020-10-26 19:17:17,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:17,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:17:17,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789762330] [2020-10-26 19:17:17,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:17:17,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:17:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:17:17,325 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 29 states. [2020-10-26 19:17:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:17,512 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2020-10-26 19:17:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:17:17,512 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 118 [2020-10-26 19:17:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:17,513 INFO L225 Difference]: With dead ends: 202 [2020-10-26 19:17:17,514 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:17:17,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:17:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:17:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-26 19:17:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:17:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2020-10-26 19:17:17,521 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 118 [2020-10-26 19:17:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:17,521 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2020-10-26 19:17:17,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:17:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2020-10-26 19:17:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 19:17:17,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:17,522 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:17,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:17:17,523 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1719762117, now seen corresponding path program 40 times [2020-10-26 19:17:17,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:17,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173121994] [2020-10-26 19:17:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:22,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:22,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 19:17:22,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 19:17:22,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:17:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:17:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:23,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:17:23,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173121994] [2020-10-26 19:17:23,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:23,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:17:23,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908133812] [2020-10-26 19:17:23,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:17:23,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:23,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:17:23,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:17:23,297 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 30 states. [2020-10-26 19:17:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:23,504 INFO L93 Difference]: Finished difference Result 204 states and 248 transitions. [2020-10-26 19:17:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:17:23,505 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-26 19:17:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:23,506 INFO L225 Difference]: With dead ends: 204 [2020-10-26 19:17:23,506 INFO L226 Difference]: Without dead ends: 133 [2020-10-26 19:17:23,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:17:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-26 19:17:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-26 19:17:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:17:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2020-10-26 19:17:23,514 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 120 [2020-10-26 19:17:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:23,514 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2020-10-26 19:17:23,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:17:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2020-10-26 19:17:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:17:23,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:23,516 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:23,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:17:23,516 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash -280414809, now seen corresponding path program 41 times [2020-10-26 19:17:23,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:23,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123654277] [2020-10-26 19:17:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:23,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:23,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:28,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:28,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:17:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:17:28,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:17:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:17:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:29,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:29,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:29,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:17:29,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123654277] [2020-10-26 19:17:29,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:29,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:17:29,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518511967] [2020-10-26 19:17:29,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:17:29,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:29,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:17:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:17:29,278 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand 31 states. [2020-10-26 19:17:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:29,536 INFO L93 Difference]: Finished difference Result 206 states and 250 transitions. [2020-10-26 19:17:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:17:29,536 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2020-10-26 19:17:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:29,537 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:17:29,538 INFO L226 Difference]: Without dead ends: 135 [2020-10-26 19:17:29,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:17:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-26 19:17:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-26 19:17:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:17:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2020-10-26 19:17:29,545 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 122 [2020-10-26 19:17:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:29,546 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2020-10-26 19:17:29,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:17:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2020-10-26 19:17:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:17:29,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:29,547 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:29,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:17:29,547 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1694907913, now seen corresponding path program 42 times [2020-10-26 19:17:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:29,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019102932] [2020-10-26 19:17:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:29,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:34,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:34,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:17:34,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:34,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-26 19:17:34,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:17:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:17:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:35,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:35,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:35,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:35,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:35,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:35,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:35,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:35,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:35,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:17:35,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019102932] [2020-10-26 19:17:35,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:35,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:17:35,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569192603] [2020-10-26 19:17:35,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:17:35,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:17:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:17:35,413 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand 32 states. [2020-10-26 19:17:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:35,731 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2020-10-26 19:17:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:17:35,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 124 [2020-10-26 19:17:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:35,733 INFO L225 Difference]: With dead ends: 208 [2020-10-26 19:17:35,733 INFO L226 Difference]: Without dead ends: 137 [2020-10-26 19:17:35,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:17:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-26 19:17:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-26 19:17:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-26 19:17:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2020-10-26 19:17:35,741 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 124 [2020-10-26 19:17:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:35,741 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2020-10-26 19:17:35,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:17:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2020-10-26 19:17:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 19:17:35,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:35,743 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:35,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:17:35,743 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1604498923, now seen corresponding path program 43 times [2020-10-26 19:17:35,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:35,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213100012] [2020-10-26 19:17:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:35,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:40,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:17:40,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:40,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:17:40,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:40,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:17:40,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:40,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:17:40,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:41,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:41,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:41,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:41,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:41,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:41,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:41,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:41,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:41,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:17:41,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213100012] [2020-10-26 19:17:41,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:41,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:17:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383750810] [2020-10-26 19:17:41,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:17:41,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:17:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:17:41,543 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand 33 states. [2020-10-26 19:17:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:41,908 INFO L93 Difference]: Finished difference Result 210 states and 254 transitions. [2020-10-26 19:17:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:17:41,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2020-10-26 19:17:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:41,910 INFO L225 Difference]: With dead ends: 210 [2020-10-26 19:17:41,910 INFO L226 Difference]: Without dead ends: 139 [2020-10-26 19:17:41,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:17:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-26 19:17:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-26 19:17:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:17:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-10-26 19:17:41,922 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 126 [2020-10-26 19:17:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:41,922 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-10-26 19:17:41,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:17:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-10-26 19:17:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:17:41,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:41,923 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:41,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:17:41,924 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash 620805453, now seen corresponding path program 44 times [2020-10-26 19:17:41,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:41,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645675876] [2020-10-26 19:17:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:41,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:47,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:17:47,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:47,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5180 [2020-10-26 19:17:47,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:47,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:17:47,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:47,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:17:47,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:47,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:47,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:47,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:17:47,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645675876] [2020-10-26 19:17:47,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:47,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:17:47,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718962049] [2020-10-26 19:17:47,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:17:47,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:17:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:17:47,954 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 34 states. [2020-10-26 19:17:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:48,205 INFO L93 Difference]: Finished difference Result 212 states and 256 transitions. [2020-10-26 19:17:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:17:48,205 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2020-10-26 19:17:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:48,207 INFO L225 Difference]: With dead ends: 212 [2020-10-26 19:17:48,207 INFO L226 Difference]: Without dead ends: 141 [2020-10-26 19:17:48,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:17:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-26 19:17:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-26 19:17:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-26 19:17:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-10-26 19:17:48,216 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 128 [2020-10-26 19:17:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:48,216 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-10-26 19:17:48,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:17:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-10-26 19:17:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:17:48,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:48,217 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:48,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:17:48,218 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:48,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:48,218 INFO L82 PathProgramCache]: Analyzing trace with hash 184185903, now seen corresponding path program 45 times [2020-10-26 19:17:48,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:48,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147381877] [2020-10-26 19:17:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:48,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking...