/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:13:09,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:13:09,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:13:09,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:13:09,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:13:09,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:13:09,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:13:09,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:13:09,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:13:09,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:13:09,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:13:09,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:13:09,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:13:09,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:13:09,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:13:09,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:13:09,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:13:09,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:13:09,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:13:09,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:13:09,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:13:09,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:13:09,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:13:09,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:13:09,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:13:09,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:13:09,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:13:09,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:13:09,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:13:09,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:13:09,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:13:09,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:13:09,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:13:09,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:13:09,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:13:09,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:13:09,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:13:09,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:13:09,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:13:09,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:13:09,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:13:09,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:13:09,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:13:09,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:13:09,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:13:09,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:13:09,798 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:13:09,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:13:09,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:13:09,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:13:09,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:13:09,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:13:09,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:13:09,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:13:09,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:13:09,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:13:09,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:13:09,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:13:09,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:13:09,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:13:09,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:13:09,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:13:09,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:13:09,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:13:09,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:13:09,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:13:09,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:13:09,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:13:09,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:13:09,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:13:09,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:13:09,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:13:10,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:13:10,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:13:10,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:13:10,291 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:13:10,292 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:13:10,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-27 20:13:10,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86f3ea2a/9e6895f0d8c84ed282291e24d7fd8b4f/FLAG0f223f055 [2020-10-27 20:13:11,016 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:13:11,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-27 20:13:11,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86f3ea2a/9e6895f0d8c84ed282291e24d7fd8b4f/FLAG0f223f055 [2020-10-27 20:13:11,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86f3ea2a/9e6895f0d8c84ed282291e24d7fd8b4f [2020-10-27 20:13:11,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:13:11,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:13:11,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:13:11,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:13:11,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:13:11,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef68179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11, skipping insertion in model container [2020-10-27 20:13:11,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:13:11,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:13:11,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:13:11,657 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:13:11,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:13:11,693 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:13:11,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11 WrapperNode [2020-10-27 20:13:11,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:13:11,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:13:11,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:13:11,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:13:11,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... [2020-10-27 20:13:11,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:13:11,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:13:11,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:13:11,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:13:11,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:13:11,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:13:11,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:13:11,825 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:13:11,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:13:11,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:13:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:13:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:13:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:13:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:13:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:13:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:13:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:13:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:13:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:13:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:13:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:13:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:13:12,170 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:13:12,171 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:13:12,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:13:12 BoogieIcfgContainer [2020-10-27 20:13:12,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:13:12,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:13:12,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:13:12,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:13:12,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:13:11" (1/3) ... [2020-10-27 20:13:12,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db4c1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:13:12, skipping insertion in model container [2020-10-27 20:13:12,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:11" (2/3) ... [2020-10-27 20:13:12,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db4c1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:13:12, skipping insertion in model container [2020-10-27 20:13:12,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:13:12" (3/3) ... [2020-10-27 20:13:12,183 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-10-27 20:13:12,198 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:13:12,203 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:13:12,220 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:13:12,250 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:13:12,251 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:13:12,251 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:13:12,251 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:13:12,251 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:13:12,251 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:13:12,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:13:12,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:13:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 20:13:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:13:12,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:12,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:12,279 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2005875033, now seen corresponding path program 1 times [2020-10-27 20:13:12,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:12,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078868917] [2020-10-27 20:13:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:12,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:12,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:12,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:13:12,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:12,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-27 20:13:12,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:12,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:12,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:13:12,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:13,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:13,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:13,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:13:13,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:13,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:13,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:13,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:13,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:13:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:13,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078868917] [2020-10-27 20:13:13,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:13:13,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:13:13,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898103704] [2020-10-27 20:13:13,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:13:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:13,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:13:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:13:13,082 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 20:13:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:13,211 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-27 20:13:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:13:13,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:13:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:13,224 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:13:13,225 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:13:13,229 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 [2020-10-27 20:13:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:13:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:13:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:13:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 20:13:13,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 20:13:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:13,291 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 20:13:13,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:13:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 20:13:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:13:13,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:13,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:13,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:13:13,294 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1519179466, now seen corresponding path program 1 times [2020-10-27 20:13:13,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:13,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972501060] [2020-10-27 20:13:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:13,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:13:13,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:13,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-27 20:13:13,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:13,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:13:13,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:13,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:13:13,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:13:13,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:13,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:13,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:13,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:13:13,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:13,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:13,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:13:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:13,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972501060] [2020-10-27 20:13:13,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:13:13,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:13:13,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441525678] [2020-10-27 20:13:13,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:13:13,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:13:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:13:13,699 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-10-27 20:13:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:13,870 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 20:13:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:13:13,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 20:13:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:13,872 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:13:13,872 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:13:13,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:13:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:13:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-27 20:13:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:13:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:13:13,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 20:13:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:13,882 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:13:13,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:13:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:13:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:13:13,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:13,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:13,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:13:13,884 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:13,885 INFO L82 PathProgramCache]: Analyzing trace with hash 956003377, now seen corresponding path program 1 times [2020-10-27 20:13:13,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:13,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645004993] [2020-10-27 20:13:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:14,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:14,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:13:14,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:14,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 20:13:14,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:14,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:13:14,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:14,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:13:14,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:14,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:14,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:14,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:14,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:14,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:13:14,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:14,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:14,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645004993] [2020-10-27 20:13:14,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:13:14,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:13:14,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288763356] [2020-10-27 20:13:14,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:13:14,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:14,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:13:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:13:14,166 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 20:13:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:14,286 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-27 20:13:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:13:14,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:13:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:14,288 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:13:14,288 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:13:14,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:13:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:13:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:13:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:13:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 20:13:14,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-27 20:13:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:14,301 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 20:13:14,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:13:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 20:13:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:13:14,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:14,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:14,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:13:14,303 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2090187385, now seen corresponding path program 1 times [2020-10-27 20:13:14,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:14,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482789411] [2020-10-27 20:13:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:14,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:14,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:14,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:13:14,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:14,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-27 20:13:14,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:13:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:13:14,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:14,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:14,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:14,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:14,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:14,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:14,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:13:14,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:14,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:14,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:14,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:14,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:14,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482789411] [2020-10-27 20:13:14,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:14,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:13:14,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59209302] [2020-10-27 20:13:14,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:13:14,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:13:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:13:14,718 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 20:13:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:14,862 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-27 20:13:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:13:14,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 20:13:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:14,863 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:13:14,863 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:13:14,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:13:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:13:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:13:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:13:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-27 20:13:14,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-27 20:13:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:14,871 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-27 20:13:14,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:13:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-27 20:13:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:13:14,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:14,872 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:14,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:13:14,872 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1404814031, now seen corresponding path program 2 times [2020-10-27 20:13:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:14,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18210723] [2020-10-27 20:13:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:14,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:15,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:13:15,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:15,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-27 20:13:15,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:15,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:13:15,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:15,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:13:15,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:15,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:15,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:15,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:15,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:15,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:15,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:15,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:15,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18210723] [2020-10-27 20:13:15,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:15,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:13:15,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058572117] [2020-10-27 20:13:15,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:13:15,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:13:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:13:15,208 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-27 20:13:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:15,359 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 20:13:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:13:15,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:13:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:15,361 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:13:15,361 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:13:15,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:13:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:13:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:13:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:13:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 20:13:15,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-10-27 20:13:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:15,368 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 20:13:15,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:13:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 20:13:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:13:15,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:15,369 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:15,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:13:15,370 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1919291769, now seen corresponding path program 3 times [2020-10-27 20:13:15,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:15,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577765093] [2020-10-27 20:13:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:15,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:15,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:13:15,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:15,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-27 20:13:15,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:13:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:13:15,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:15,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:15,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:15,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:15,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:15,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:15,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:15,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:15,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577765093] [2020-10-27 20:13:15,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:15,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:13:15,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342483403] [2020-10-27 20:13:15,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:13:15,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:13:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:13:15,741 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2020-10-27 20:13:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:15,931 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 20:13:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:13:15,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 20:13:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:15,932 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:13:15,932 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:13:15,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:13:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:13:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 20:13:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:13:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 20:13:15,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-27 20:13:15,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:15,940 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 20:13:15,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:13:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 20:13:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:13:15,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:15,941 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:15,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:13:15,942 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1887356465, now seen corresponding path program 4 times [2020-10-27 20:13:15,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:15,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80283069] [2020-10-27 20:13:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:16,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:16,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:13:16,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:16,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 20:13:16,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:16,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:13:16,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:16,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:13:16,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:16,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:16,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:16,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:16,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:16,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:16,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:16,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:16,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:16,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:16,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:16,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80283069] [2020-10-27 20:13:16,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:16,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:13:16,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852324834] [2020-10-27 20:13:16,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:13:16,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:16,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:13:16,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:13:16,429 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-27 20:13:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:16,665 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 20:13:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:13:16,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 20:13:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:16,666 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:13:16,666 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:13:16,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:13:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:13:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 20:13:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:13:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 20:13:16,683 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-27 20:13:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:16,683 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 20:13:16,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:13:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 20:13:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:13:16,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:16,684 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:16,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:13:16,685 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 897362041, now seen corresponding path program 5 times [2020-10-27 20:13:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:16,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967616938] [2020-10-27 20:13:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:16,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:17,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:13:17,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-27 20:13:17,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:13:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:13:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:17,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:17,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:17,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:17,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:17,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:17,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:17,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:17,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967616938] [2020-10-27 20:13:17,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:17,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:13:17,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66531905] [2020-10-27 20:13:17,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:13:17,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:17,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:13:17,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:13:17,159 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-10-27 20:13:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:17,459 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 20:13:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:13:17,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 20:13:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:17,460 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:13:17,460 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:13:17,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:13:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:13:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 20:13:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:13:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 20:13:17,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-10-27 20:13:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:17,468 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 20:13:17,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:13:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 20:13:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:13:17,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:17,469 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:17,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:13:17,470 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 272305969, now seen corresponding path program 6 times [2020-10-27 20:13:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:17,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038256816] [2020-10-27 20:13:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:17,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:17,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:13:17,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:17,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-27 20:13:17,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:17,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:13:17,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:17,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:13:17,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:18,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:18,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:18,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:18,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:18,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:18,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:18,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:18,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:18,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038256816] [2020-10-27 20:13:18,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:18,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:13:18,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492777469] [2020-10-27 20:13:18,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:13:18,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:18,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:13:18,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:13:18,122 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-10-27 20:13:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:18,466 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 20:13:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:13:18,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-27 20:13:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:18,468 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:13:18,468 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:13:18,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:13:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:13:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 20:13:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:13:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 20:13:18,480 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-27 20:13:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:18,481 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 20:13:18,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:13:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 20:13:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:13:18,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:18,482 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:18,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:13:18,483 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1924563079, now seen corresponding path program 7 times [2020-10-27 20:13:18,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:18,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497516622] [2020-10-27 20:13:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:18,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:19,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:19,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:13:19,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:19,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 20:13:19,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:19,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:13:19,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:19,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:13:19,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:19,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:19,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:19,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:19,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:19,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:19,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:19,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:19,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:19,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:19,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497516622] [2020-10-27 20:13:19,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:19,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:13:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586125732] [2020-10-27 20:13:19,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:13:19,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:13:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:13:19,308 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2020-10-27 20:13:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:19,715 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 20:13:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:13:19,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-27 20:13:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:19,717 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:13:19,717 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:13:19,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:13:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:13:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 20:13:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:13:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-27 20:13:19,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2020-10-27 20:13:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:19,725 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-27 20:13:19,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:13:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-27 20:13:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:13:19,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:19,726 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:19,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:13:19,726 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:19,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:19,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1308026831, now seen corresponding path program 8 times [2020-10-27 20:13:19,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:19,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217887212] [2020-10-27 20:13:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:19,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:19,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:20,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:20,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:13:20,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:20,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-27 20:13:20,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:13:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:13:20,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:20,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:20,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:20,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:20,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:20,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:20,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:13:20,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:20,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:20,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:20,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:20,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:20,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217887212] [2020-10-27 20:13:20,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:20,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:13:20,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945968083] [2020-10-27 20:13:20,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:13:20,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:20,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:13:20,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:13:20,465 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-10-27 20:13:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:20,956 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-27 20:13:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:13:20,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 20:13:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:20,961 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:13:20,961 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:13:20,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:13:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:13:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 20:13:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:13:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 20:13:20,980 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-10-27 20:13:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:20,980 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 20:13:20,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:13:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 20:13:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:13:20,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:20,981 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:20,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:13:20,981 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash 624727673, now seen corresponding path program 9 times [2020-10-27 20:13:20,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:20,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236751807] [2020-10-27 20:13:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:21,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:21,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:13:21,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:21,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-27 20:13:21,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:21,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:13:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:13:21,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:21,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:21,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:21,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:21,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:21,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:21,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236751807] [2020-10-27 20:13:21,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:21,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:13:21,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692371771] [2020-10-27 20:13:21,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:13:21,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:13:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:13:21,944 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2020-10-27 20:13:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:22,536 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 20:13:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:13:22,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-27 20:13:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:22,537 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:13:22,537 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:13:22,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:13:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:13:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 20:13:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:13:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-27 20:13:22,545 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2020-10-27 20:13:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:22,546 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-27 20:13:22,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:13:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-27 20:13:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:13:22,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:22,547 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:22,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:13:22,547 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 410575153, now seen corresponding path program 10 times [2020-10-27 20:13:22,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:22,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976388119] [2020-10-27 20:13:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:22,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:22,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:22,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:13:22,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:22,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:13:22,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:22,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:13:22,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:22,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:13:22,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:22,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:22,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:22,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:22,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:22,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:22,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:22,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:22,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:22,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:22,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 20:13:22,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976388119] [2020-10-27 20:13:22,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:22,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:13:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541474750] [2020-10-27 20:13:22,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:13:22,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:13:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:13:22,709 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2020-10-27 20:13:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:22,836 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-27 20:13:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:13:22,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-27 20:13:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:22,838 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:13:22,838 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:13:22,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:13:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:13:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2020-10-27 20:13:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:13:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 20:13:22,851 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 25 [2020-10-27 20:13:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:22,851 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 20:13:22,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:13:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 20:13:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:13:22,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:22,853 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:22,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:13:22,853 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash -467061206, now seen corresponding path program 11 times [2020-10-27 20:13:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:22,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144213822] [2020-10-27 20:13:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:22,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:22,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:23,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:23,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:13:23,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:23,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-27 20:13:23,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:23,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:13:23,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:23,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:13:23,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:23,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:23,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:23,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:23,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:23,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:23,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:23,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:23,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:23,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:23,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 20:13:23,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144213822] [2020-10-27 20:13:23,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:23,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:13:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670160534] [2020-10-27 20:13:23,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:13:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:13:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:13:23,416 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 8 states. [2020-10-27 20:13:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:23,702 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-27 20:13:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:13:23,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-27 20:13:23,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:23,704 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:13:23,704 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:13:23,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:13:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:13:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2020-10-27 20:13:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:13:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-27 20:13:23,722 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 38 [2020-10-27 20:13:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:23,722 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-27 20:13:23,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:13:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-27 20:13:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:13:23,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:23,724 INFO L422 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:23,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:13:23,724 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash 224034257, now seen corresponding path program 12 times [2020-10-27 20:13:23,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:23,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254286255] [2020-10-27 20:13:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:23,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:23,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:23,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:13:23,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:23,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 20:13:23,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:23,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:13:23,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:23,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:13:23,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:24,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:24,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:24,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:24,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:24,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:24,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:24,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:24,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-27 20:13:24,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254286255] [2020-10-27 20:13:24,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:24,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:13:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050557868] [2020-10-27 20:13:24,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:13:24,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:13:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:13:24,116 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 7 states. [2020-10-27 20:13:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:24,368 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-10-27 20:13:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:13:24,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-27 20:13:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:24,369 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:13:24,370 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:13:24,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:13:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:13:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2020-10-27 20:13:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 20:13:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-27 20:13:24,393 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 51 [2020-10-27 20:13:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:24,394 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-27 20:13:24,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:13:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-27 20:13:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:13:24,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:24,395 INFO L422 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:24,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:13:24,395 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash -161276534, now seen corresponding path program 13 times [2020-10-27 20:13:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:24,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768039470] [2020-10-27 20:13:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:24,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:24,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:25,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:25,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:13:25,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:25,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 20:13:25,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:25,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:13:25,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:25,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 20:13:25,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:25,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:25,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:25,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:25,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:25,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:25,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:25,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:25,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:25,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:25,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:25,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-27 20:13:25,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768039470] [2020-10-27 20:13:25,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:25,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:13:25,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961048841] [2020-10-27 20:13:25,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:13:25,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:13:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:13:25,277 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 10 states. [2020-10-27 20:13:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:25,750 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-27 20:13:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:13:25,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-27 20:13:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:25,752 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:13:25,752 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:13:25,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:13:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:13:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-10-27 20:13:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:13:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-27 20:13:25,781 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 64 [2020-10-27 20:13:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:25,782 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-27 20:13:25,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:13:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-27 20:13:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:13:25,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:25,783 INFO L422 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:25,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:13:25,783 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:25,784 INFO L82 PathProgramCache]: Analyzing trace with hash -203713935, now seen corresponding path program 14 times [2020-10-27 20:13:25,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:25,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699837479] [2020-10-27 20:13:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:25,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:26,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:26,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:13:26,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:26,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-27 20:13:26,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:13:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 20:13:26,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:26,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:26,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:26,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:26,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:26,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:26,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:26,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:26,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-27 20:13:26,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699837479] [2020-10-27 20:13:26,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:26,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:13:26,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051305737] [2020-10-27 20:13:26,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:13:26,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:26,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:13:26,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:13:26,519 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 9 states. [2020-10-27 20:13:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:26,928 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-27 20:13:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:13:26,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-27 20:13:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:26,930 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:13:26,930 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:13:26,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:13:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:13:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2020-10-27 20:13:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:13:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-27 20:13:26,964 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 77 [2020-10-27 20:13:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:26,964 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-27 20:13:26,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:13:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-27 20:13:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 20:13:26,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:26,966 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:26,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:13:26,966 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash -404714262, now seen corresponding path program 15 times [2020-10-27 20:13:26,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:26,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617229442] [2020-10-27 20:13:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:27,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:27,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:28,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:28,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:13:28,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:28,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-27 20:13:28,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:13:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 20:13:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:13:28,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:28,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:28,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:28,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:28,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:28,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:28,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:28,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:28,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:28,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:28,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-27 20:13:28,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617229442] [2020-10-27 20:13:28,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:28,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:13:28,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295305807] [2020-10-27 20:13:28,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:13:28,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:13:28,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:13:28,661 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 12 states. [2020-10-27 20:13:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:29,394 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-27 20:13:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:13:29,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2020-10-27 20:13:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:29,396 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:13:29,396 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 20:13:29,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:13:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 20:13:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2020-10-27 20:13:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:13:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-10-27 20:13:29,446 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 90 [2020-10-27 20:13:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:29,446 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-10-27 20:13:29,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:13:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-10-27 20:13:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 20:13:29,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:29,454 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:29,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:13:29,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash -216654063, now seen corresponding path program 16 times [2020-10-27 20:13:29,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:29,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680366713] [2020-10-27 20:13:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:29,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:30,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:30,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 20:13:30,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:30,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-27 20:13:30,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:13:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 20:13:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:13:30,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:30,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:30,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:30,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:30,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:30,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-27 20:13:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680366713] [2020-10-27 20:13:30,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:30,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:13:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341575412] [2020-10-27 20:13:30,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:13:30,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:13:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:13:30,653 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 11 states. [2020-10-27 20:13:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:31,273 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2020-10-27 20:13:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:13:31,273 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-27 20:13:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:31,275 INFO L225 Difference]: With dead ends: 135 [2020-10-27 20:13:31,275 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:13:31,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:13:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:13:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-10-27 20:13:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:13:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-10-27 20:13:31,325 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 103 [2020-10-27 20:13:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:31,325 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-10-27 20:13:31,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:13:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-10-27 20:13:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 20:13:31,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:31,327 INFO L422 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:31,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:13:31,327 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:31,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1808237642, now seen corresponding path program 17 times [2020-10-27 20:13:31,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:31,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916714710] [2020-10-27 20:13:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:32,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:32,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:32,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 20:13:32,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:32,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-27 20:13:32,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:32,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:13:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 20:13:32,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:33,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:33,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:33,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:33,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:33,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:33,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:33,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:33,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:33,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-27 20:13:33,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916714710] [2020-10-27 20:13:33,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:33,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:13:33,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119733005] [2020-10-27 20:13:33,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:13:33,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:13:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:13:33,107 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 12 states. [2020-10-27 20:13:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:33,804 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2020-10-27 20:13:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:13:33,804 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 116 [2020-10-27 20:13:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:33,806 INFO L225 Difference]: With dead ends: 148 [2020-10-27 20:13:33,806 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 20:13:33,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:13:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 20:13:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2020-10-27 20:13:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 20:13:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2020-10-27 20:13:33,855 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 116 [2020-10-27 20:13:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:33,855 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2020-10-27 20:13:33,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:13:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2020-10-27 20:13:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 20:13:33,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:33,859 INFO L422 BasicCegarLoop]: trace histogram [90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:33,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:13:33,859 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash 631514033, now seen corresponding path program 18 times [2020-10-27 20:13:33,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:33,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79477670] [2020-10-27 20:13:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:34,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:35,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:35,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 20:13:35,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1434 [2020-10-27 20:13:35,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:13:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 20:13:35,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:35,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:35,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:35,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:35,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:35,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-27 20:13:35,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79477670] [2020-10-27 20:13:35,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:35,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:13:35,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579699756] [2020-10-27 20:13:35,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:13:35,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:35,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:13:35,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:13:35,675 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand 13 states. [2020-10-27 20:13:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:36,456 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-27 20:13:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:13:36,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 129 [2020-10-27 20:13:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:36,458 INFO L225 Difference]: With dead ends: 161 [2020-10-27 20:13:36,458 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 20:13:36,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:13:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 20:13:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2020-10-27 20:13:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 20:13:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2020-10-27 20:13:36,505 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 129 [2020-10-27 20:13:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:36,506 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2020-10-27 20:13:36,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:13:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2020-10-27 20:13:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-27 20:13:36,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:36,508 INFO L422 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:36,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:13:36,508 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:36,508 INFO L82 PathProgramCache]: Analyzing trace with hash -239205462, now seen corresponding path program 19 times [2020-10-27 20:13:36,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:36,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347659011] [2020-10-27 20:13:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:36,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:39,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:39,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 20:13:39,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:39,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3017 [2020-10-27 20:13:39,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:39,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:13:39,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:39,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 20:13:39,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:39,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:39,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:39,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:39,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:39,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:39,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:39,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:39,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:39,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-27 20:13:40,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347659011] [2020-10-27 20:13:40,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:40,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:13:40,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406430442] [2020-10-27 20:13:40,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:13:40,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:40,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:13:40,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:13:40,066 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand 14 states. [2020-10-27 20:13:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:41,050 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2020-10-27 20:13:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:13:41,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 142 [2020-10-27 20:13:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:41,054 INFO L225 Difference]: With dead ends: 174 [2020-10-27 20:13:41,055 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 20:13:41,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 20:13:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2020-10-27 20:13:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 20:13:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-10-27 20:13:41,126 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 142 [2020-10-27 20:13:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:41,127 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-10-27 20:13:41,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:13:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-10-27 20:13:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 20:13:41,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:41,129 INFO L422 BasicCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:41,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:13:41,129 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:41,130 INFO L82 PathProgramCache]: Analyzing trace with hash 966762577, now seen corresponding path program 20 times [2020-10-27 20:13:41,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:41,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018783668] [2020-10-27 20:13:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:41,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:43,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:43,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 20:13:43,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:43,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-27 20:13:43,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:13:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:43,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-27 20:13:43,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:43,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:43,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:43,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:43,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:43,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:43,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:43,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:43,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:43,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:43,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-10-27 20:13:43,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018783668] [2020-10-27 20:13:43,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:43,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:13:43,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064544045] [2020-10-27 20:13:43,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:13:43,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:43,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:13:43,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:13:43,461 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 15 states. [2020-10-27 20:13:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:44,536 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2020-10-27 20:13:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:13:44,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 155 [2020-10-27 20:13:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:44,539 INFO L225 Difference]: With dead ends: 187 [2020-10-27 20:13:44,539 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 20:13:44,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:13:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 20:13:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2020-10-27 20:13:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 20:13:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2020-10-27 20:13:44,621 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 155 [2020-10-27 20:13:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:44,622 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2020-10-27 20:13:44,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:13:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2020-10-27 20:13:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 20:13:44,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:44,624 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:44,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:13:44,624 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 99224330, now seen corresponding path program 21 times [2020-10-27 20:13:44,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:44,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216301374] [2020-10-27 20:13:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:44,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:46,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:47,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:47,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 20:13:47,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:47,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2492 [2020-10-27 20:13:47,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:47,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:13:47,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:47,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-27 20:13:47,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:47,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:47,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:47,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:47,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:47,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:13:47,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:47,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:47,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:47,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:47,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-27 20:13:47,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216301374] [2020-10-27 20:13:47,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:47,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:13:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549130385] [2020-10-27 20:13:47,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:13:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:13:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:13:47,723 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand 18 states. [2020-10-27 20:13:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:49,294 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2020-10-27 20:13:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:13:49,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 168 [2020-10-27 20:13:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:49,296 INFO L225 Difference]: With dead ends: 200 [2020-10-27 20:13:49,296 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 20:13:49,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 20:13:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2020-10-27 20:13:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 20:13:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 195 transitions. [2020-10-27 20:13:49,359 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 195 transitions. Word has length 168 [2020-10-27 20:13:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:49,359 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 195 transitions. [2020-10-27 20:13:49,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:13:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 195 transitions. [2020-10-27 20:13:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 20:13:49,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:49,362 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:49,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:13:49,362 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash 279090417, now seen corresponding path program 22 times [2020-10-27 20:13:49,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:49,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929542460] [2020-10-27 20:13:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:49,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:52,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:52,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 20:13:52,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2736 [2020-10-27 20:13:52,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:13:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:52,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-27 20:13:52,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:52,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:52,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:52,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:52,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:52,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:52,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:52,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:52,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:52,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:52,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:52,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-27 20:13:52,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929542460] [2020-10-27 20:13:52,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:52,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:13:52,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500856840] [2020-10-27 20:13:52,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:13:52,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:52,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:13:52,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:13:52,628 INFO L87 Difference]: Start difference. First operand 182 states and 195 transitions. Second operand 17 states. [2020-10-27 20:13:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:53,979 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-27 20:13:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:13:53,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 181 [2020-10-27 20:13:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:53,982 INFO L225 Difference]: With dead ends: 213 [2020-10-27 20:13:53,983 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 20:13:53,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 20:13:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2020-10-27 20:13:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 20:13:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-10-27 20:13:54,037 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 181 [2020-10-27 20:13:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:54,038 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-10-27 20:13:54,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:13:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-10-27 20:13:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 20:13:54,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:54,040 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:54,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:13:54,041 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1326343574, now seen corresponding path program 23 times [2020-10-27 20:13:54,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:54,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99602237] [2020-10-27 20:13:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:54,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:55,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:57,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:57,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 20:13:57,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3694 [2020-10-27 20:13:57,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:57,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:13:57,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-27 20:13:57,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:58,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:58,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:58,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:58,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:58,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:58,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:58,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:58,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:58,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:58,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-27 20:13:58,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99602237] [2020-10-27 20:13:58,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:58,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:13:58,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624101905] [2020-10-27 20:13:58,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:13:58,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:13:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:13:58,438 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 20 states. [2020-10-27 20:14:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:00,312 INFO L93 Difference]: Finished difference Result 226 states and 242 transitions. [2020-10-27 20:14:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:14:00,313 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 194 [2020-10-27 20:14:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:00,315 INFO L225 Difference]: With dead ends: 226 [2020-10-27 20:14:00,316 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 20:14:00,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 20:14:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2020-10-27 20:14:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 20:14:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2020-10-27 20:14:00,378 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 194 [2020-10-27 20:14:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:00,378 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2020-10-27 20:14:00,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:14:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2020-10-27 20:14:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 20:14:00,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:00,380 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:00,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:14:00,380 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1606877585, now seen corresponding path program 24 times [2020-10-27 20:14:00,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:00,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576781] [2020-10-27 20:14:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:00,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2278 [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-27 20:14:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:03,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:03,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:03,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:03,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:03,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:03,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-10-27 20:14:03,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576781] [2020-10-27 20:14:03,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:03,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:14:03,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332189271] [2020-10-27 20:14:03,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:14:03,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:14:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:14:03,304 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand 19 states. [2020-10-27 20:14:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:04,969 INFO L93 Difference]: Finished difference Result 239 states and 256 transitions. [2020-10-27 20:14:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:14:04,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 207 [2020-10-27 20:14:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:04,972 INFO L225 Difference]: With dead ends: 239 [2020-10-27 20:14:04,972 INFO L226 Difference]: Without dead ends: 233 [2020-10-27 20:14:04,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:14:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-27 20:14:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-10-27 20:14:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-27 20:14:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2020-10-27 20:14:05,043 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 207 [2020-10-27 20:14:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:05,043 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2020-10-27 20:14:05,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:14:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2020-10-27 20:14:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 20:14:05,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:05,045 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:05,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:14:05,045 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash -671436342, now seen corresponding path program 25 times [2020-10-27 20:14:05,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:05,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328261111] [2020-10-27 20:14:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3268 [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-27 20:14:08,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:08,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:08,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:08,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:08,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:08,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-27 20:14:09,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328261111] [2020-10-27 20:14:09,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:09,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:14:09,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957530939] [2020-10-27 20:14:09,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:14:09,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:09,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:14:09,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:14:09,096 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand 20 states. [2020-10-27 20:14:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:10,989 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-10-27 20:14:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:14:10,990 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 220 [2020-10-27 20:14:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:10,992 INFO L225 Difference]: With dead ends: 252 [2020-10-27 20:14:10,992 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 20:14:10,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 20:14:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2020-10-27 20:14:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 20:14:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 251 transitions. [2020-10-27 20:14:11,066 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 251 transitions. Word has length 220 [2020-10-27 20:14:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:11,066 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 251 transitions. [2020-10-27 20:14:11,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:14:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 251 transitions. [2020-10-27 20:14:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 20:14:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:11,068 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:11,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:14:11,068 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1336337969, now seen corresponding path program 26 times [2020-10-27 20:14:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:11,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546247295] [2020-10-27 20:14:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3451 [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-27 20:14:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:15,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:15,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:15,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:15,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-10-27 20:14:15,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546247295] [2020-10-27 20:14:15,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:15,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:14:15,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712135091] [2020-10-27 20:14:15,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:14:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:14:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:14:15,250 INFO L87 Difference]: Start difference. First operand 234 states and 251 transitions. Second operand 21 states. [2020-10-27 20:14:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:17,295 INFO L93 Difference]: Finished difference Result 265 states and 284 transitions. [2020-10-27 20:14:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:14:17,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 233 [2020-10-27 20:14:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:17,297 INFO L225 Difference]: With dead ends: 265 [2020-10-27 20:14:17,297 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 20:14:17,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:14:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 20:14:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-10-27 20:14:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 20:14:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 265 transitions. [2020-10-27 20:14:17,365 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 265 transitions. Word has length 233 [2020-10-27 20:14:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:17,366 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 265 transitions. [2020-10-27 20:14:17,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:14:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 265 transitions. [2020-10-27 20:14:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 20:14:17,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:17,367 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:17,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:14:17,368 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:17,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1666494166, now seen corresponding path program 27 times [2020-10-27 20:14:17,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:17,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510423872] [2020-10-27 20:14:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:17,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:20,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:22,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:22,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 20:14:22,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:22,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 20:14:22,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:14:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-27 20:14:22,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:23,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:23,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:23,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:23,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:23,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:23,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:23,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-27 20:14:23,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510423872] [2020-10-27 20:14:23,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:23,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:14:23,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340195261] [2020-10-27 20:14:23,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:14:23,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:23,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:14:23,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:14:23,473 INFO L87 Difference]: Start difference. First operand 247 states and 265 transitions. Second operand 24 states. [2020-10-27 20:14:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:26,028 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2020-10-27 20:14:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:14:26,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2020-10-27 20:14:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:26,030 INFO L225 Difference]: With dead ends: 278 [2020-10-27 20:14:26,030 INFO L226 Difference]: Without dead ends: 272 [2020-10-27 20:14:26,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:14:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-27 20:14:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 260. [2020-10-27 20:14:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 20:14:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 279 transitions. [2020-10-27 20:14:26,106 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 279 transitions. Word has length 246 [2020-10-27 20:14:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:26,107 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 279 transitions. [2020-10-27 20:14:26,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:14:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 279 transitions. [2020-10-27 20:14:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-27 20:14:26,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:26,109 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:26,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:14:26,109 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:26,110 INFO L82 PathProgramCache]: Analyzing trace with hash 475808465, now seen corresponding path program 28 times [2020-10-27 20:14:26,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:26,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721678983] [2020-10-27 20:14:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:26,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4064 [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-27 20:14:30,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:30,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:30,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-10-27 20:14:30,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721678983] [2020-10-27 20:14:30,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:30,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:14:30,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690056037] [2020-10-27 20:14:30,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:14:30,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:30,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:14:30,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:14:30,998 INFO L87 Difference]: Start difference. First operand 260 states and 279 transitions. Second operand 23 states. [2020-10-27 20:14:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:33,371 INFO L93 Difference]: Finished difference Result 291 states and 312 transitions. [2020-10-27 20:14:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:14:33,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 259 [2020-10-27 20:14:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:33,379 INFO L225 Difference]: With dead ends: 291 [2020-10-27 20:14:33,379 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 20:14:33,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:14:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 20:14:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 273. [2020-10-27 20:14:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 20:14:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 293 transitions. [2020-10-27 20:14:33,463 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 293 transitions. Word has length 259 [2020-10-27 20:14:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:33,463 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 293 transitions. [2020-10-27 20:14:33,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:14:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 293 transitions. [2020-10-27 20:14:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 20:14:33,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:33,465 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:33,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:14:33,465 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:33,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1121355638, now seen corresponding path program 29 times [2020-10-27 20:14:33,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:33,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107774428] [2020-10-27 20:14:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:33,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:38,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:38,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 20:14:38,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:38,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 20:14:38,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:14:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-27 20:14:38,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:39,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:39,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-27 20:14:39,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107774428] [2020-10-27 20:14:39,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:39,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:14:39,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664068370] [2020-10-27 20:14:39,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:14:39,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:39,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:14:39,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:14:39,429 INFO L87 Difference]: Start difference. First operand 273 states and 293 transitions. Second operand 24 states. [2020-10-27 20:14:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:42,086 INFO L93 Difference]: Finished difference Result 304 states and 326 transitions. [2020-10-27 20:14:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:14:42,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 272 [2020-10-27 20:14:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:42,089 INFO L225 Difference]: With dead ends: 304 [2020-10-27 20:14:42,090 INFO L226 Difference]: Without dead ends: 298 [2020-10-27 20:14:42,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:14:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-27 20:14:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 286. [2020-10-27 20:14:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-27 20:14:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 307 transitions. [2020-10-27 20:14:42,170 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 307 transitions. Word has length 272 [2020-10-27 20:14:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:42,171 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 307 transitions. [2020-10-27 20:14:42,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:14:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 307 transitions. [2020-10-27 20:14:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 20:14:42,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:42,173 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:42,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:14:42,173 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1249831055, now seen corresponding path program 30 times [2020-10-27 20:14:42,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:42,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728599550] [2020-10-27 20:14:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:42,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:47,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:47,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-27 20:14:47,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:47,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 20:14:47,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:14:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-27 20:14:47,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:48,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:48,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:48,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:48,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-27 20:14:48,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728599550] [2020-10-27 20:14:48,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:48,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:14:48,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047337824] [2020-10-27 20:14:48,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:14:48,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:14:48,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:14:48,186 INFO L87 Difference]: Start difference. First operand 286 states and 307 transitions. Second operand 25 states. [2020-10-27 20:14:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:51,070 INFO L93 Difference]: Finished difference Result 317 states and 340 transitions. [2020-10-27 20:14:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:14:51,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 285 [2020-10-27 20:14:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:51,073 INFO L225 Difference]: With dead ends: 317 [2020-10-27 20:14:51,073 INFO L226 Difference]: Without dead ends: 311 [2020-10-27 20:14:51,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:14:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-27 20:14:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2020-10-27 20:14:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-27 20:14:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2020-10-27 20:14:51,176 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 285 [2020-10-27 20:14:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:51,177 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2020-10-27 20:14:51,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:14:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2020-10-27 20:14:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-27 20:14:51,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:51,179 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:51,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:14:51,180 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:51,180 INFO L82 PathProgramCache]: Analyzing trace with hash -199546902, now seen corresponding path program 31 times [2020-10-27 20:14:51,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:51,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170435972] [2020-10-27 20:14:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:51,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:56,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:56,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 20:14:56,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:56,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 20:14:56,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:56,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:14:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-27 20:14:56,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:57,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:57,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:57,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:57,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:57,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:57,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:57,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:57,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:57,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:57,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:57,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-27 20:14:57,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170435972] [2020-10-27 20:14:57,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:57,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:14:57,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178888644] [2020-10-27 20:14:57,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:14:57,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:57,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:14:57,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:14:57,329 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand 28 states. [2020-10-27 20:15:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:00,855 INFO L93 Difference]: Finished difference Result 330 states and 354 transitions. [2020-10-27 20:15:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:15:00,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 298 [2020-10-27 20:15:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:00,859 INFO L225 Difference]: With dead ends: 330 [2020-10-27 20:15:00,859 INFO L226 Difference]: Without dead ends: 324 [2020-10-27 20:15:00,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:15:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-27 20:15:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2020-10-27 20:15:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-27 20:15:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 335 transitions. [2020-10-27 20:15:01,009 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 335 transitions. Word has length 298 [2020-10-27 20:15:01,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:01,010 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 335 transitions. [2020-10-27 20:15:01,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:15:01,010 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 335 transitions. [2020-10-27 20:15:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 20:15:01,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:01,013 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:01,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:15:01,014 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1580164113, now seen corresponding path program 32 times [2020-10-27 20:15:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:01,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865031637] [2020-10-27 20:15:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:01,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-27 20:15:06,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:06,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:06,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:06,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-27 20:15:07,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865031637] [2020-10-27 20:15:07,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:07,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:15:07,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406125351] [2020-10-27 20:15:07,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:15:07,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:07,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:15:07,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:15:07,115 INFO L87 Difference]: Start difference. First operand 312 states and 335 transitions. Second operand 27 states. [2020-10-27 20:15:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:10,502 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2020-10-27 20:15:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:15:10,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 311 [2020-10-27 20:15:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:10,504 INFO L225 Difference]: With dead ends: 343 [2020-10-27 20:15:10,505 INFO L226 Difference]: Without dead ends: 337 [2020-10-27 20:15:10,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:15:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-27 20:15:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 325. [2020-10-27 20:15:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 20:15:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 349 transitions. [2020-10-27 20:15:10,604 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 349 transitions. Word has length 311 [2020-10-27 20:15:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:10,605 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 349 transitions. [2020-10-27 20:15:10,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:15:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 349 transitions. [2020-10-27 20:15:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-27 20:15:10,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:10,607 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:10,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:15:10,607 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1487298378, now seen corresponding path program 33 times [2020-10-27 20:15:10,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:10,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317245406] [2020-10-27 20:15:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:10,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-27 20:15:15,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:16,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:16,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:16,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:16,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:16,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:16,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:16,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:16,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:16,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-27 20:15:16,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317245406] [2020-10-27 20:15:16,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:16,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:15:16,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337018728] [2020-10-27 20:15:16,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:15:16,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:15:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:15:16,842 INFO L87 Difference]: Start difference. First operand 325 states and 349 transitions. Second operand 28 states. [2020-10-27 20:15:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:20,507 INFO L93 Difference]: Finished difference Result 356 states and 382 transitions. [2020-10-27 20:15:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:15:20,508 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 324 [2020-10-27 20:15:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:20,510 INFO L225 Difference]: With dead ends: 356 [2020-10-27 20:15:20,510 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 20:15:20,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:15:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 20:15:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 338. [2020-10-27 20:15:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-27 20:15:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 363 transitions. [2020-10-27 20:15:20,666 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 363 transitions. Word has length 324 [2020-10-27 20:15:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:20,666 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 363 transitions. [2020-10-27 20:15:20,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:15:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 363 transitions. [2020-10-27 20:15:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-27 20:15:20,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:20,669 INFO L422 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:20,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:15:20,670 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1291921585, now seen corresponding path program 34 times [2020-10-27 20:15:20,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:20,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285737595] [2020-10-27 20:15:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:20,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:25,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 327 [2020-10-27 20:15:25,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:26,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:26,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:26,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:26,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:26,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:15:26,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:26,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2020-10-27 20:15:27,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285737595] [2020-10-27 20:15:27,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:27,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:15:27,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119166402] [2020-10-27 20:15:27,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:15:27,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:27,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:15:27,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:15:27,054 INFO L87 Difference]: Start difference. First operand 338 states and 363 transitions. Second operand 29 states. [2020-10-27 20:15:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:30,750 INFO L93 Difference]: Finished difference Result 369 states and 396 transitions. [2020-10-27 20:15:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:15:30,751 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 337 [2020-10-27 20:15:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:30,754 INFO L225 Difference]: With dead ends: 369 [2020-10-27 20:15:30,754 INFO L226 Difference]: Without dead ends: 363 [2020-10-27 20:15:30,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:15:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-27 20:15:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2020-10-27 20:15:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 20:15:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 377 transitions. [2020-10-27 20:15:30,877 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 377 transitions. Word has length 337 [2020-10-27 20:15:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:30,878 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 377 transitions. [2020-10-27 20:15:30,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:15:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 377 transitions. [2020-10-27 20:15:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-27 20:15:30,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:30,879 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:30,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:15:30,880 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:30,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1099882838, now seen corresponding path program 35 times [2020-10-27 20:15:30,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:30,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390247462] [2020-10-27 20:15:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:36,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-27 20:15:36,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:37,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:37,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:37,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:37,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:37,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:15:37,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:37,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-27 20:15:37,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390247462] [2020-10-27 20:15:37,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:37,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:15:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141333316] [2020-10-27 20:15:37,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:15:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:15:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:15:37,295 INFO L87 Difference]: Start difference. First operand 351 states and 377 transitions. Second operand 30 states. [2020-10-27 20:15:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:41,511 INFO L93 Difference]: Finished difference Result 382 states and 410 transitions. [2020-10-27 20:15:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:15:41,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 350 [2020-10-27 20:15:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:41,514 INFO L225 Difference]: With dead ends: 382 [2020-10-27 20:15:41,514 INFO L226 Difference]: Without dead ends: 376 [2020-10-27 20:15:41,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:15:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-27 20:15:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2020-10-27 20:15:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-27 20:15:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 391 transitions. [2020-10-27 20:15:41,659 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 391 transitions. Word has length 350 [2020-10-27 20:15:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:41,659 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 391 transitions. [2020-10-27 20:15:41,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:15:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 391 transitions. [2020-10-27 20:15:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-27 20:15:41,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:41,662 INFO L422 BasicCegarLoop]: trace histogram [270, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:41,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:15:41,662 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1276142929, now seen corresponding path program 36 times [2020-10-27 20:15:41,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:41,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892966296] [2020-10-27 20:15:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:46,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:46,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-27 20:15:46,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:46,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 20:15:46,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:46,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:15:46,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 353 [2020-10-27 20:15:46,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:47,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:47,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:47,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:47,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:47,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:15:47,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:47,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-10-27 20:15:48,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892966296] [2020-10-27 20:15:48,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:48,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:15:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296803533] [2020-10-27 20:15:48,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:15:48,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:15:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:15:48,162 INFO L87 Difference]: Start difference. First operand 364 states and 391 transitions. Second operand 31 states. [2020-10-27 20:15:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:52,594 INFO L93 Difference]: Finished difference Result 395 states and 424 transitions. [2020-10-27 20:15:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:15:52,594 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 363 [2020-10-27 20:15:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:52,596 INFO L225 Difference]: With dead ends: 395 [2020-10-27 20:15:52,596 INFO L226 Difference]: Without dead ends: 389 [2020-10-27 20:15:52,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:15:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-27 20:15:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 377. [2020-10-27 20:15:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-27 20:15:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 405 transitions. [2020-10-27 20:15:52,795 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 405 transitions. Word has length 363 [2020-10-27 20:15:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:52,796 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 405 transitions. [2020-10-27 20:15:52,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:15:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 405 transitions. [2020-10-27 20:15:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-27 20:15:52,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:52,799 INFO L422 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:52,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:15:52,799 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash 362898954, now seen corresponding path program 37 times [2020-10-27 20:15:52,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:52,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566292419] [2020-10-27 20:15:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:53,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:58,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 366 [2020-10-27 20:15:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:59,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:59,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:59,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:59,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:59,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-10-27 20:15:59,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566292419] [2020-10-27 20:15:59,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:59,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:15:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565431026] [2020-10-27 20:15:59,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:15:59,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:59,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:15:59,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:15:59,341 INFO L87 Difference]: Start difference. First operand 377 states and 405 transitions. Second operand 32 states. [2020-10-27 20:16:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:04,097 INFO L93 Difference]: Finished difference Result 408 states and 438 transitions. [2020-10-27 20:16:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:16:04,097 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 376 [2020-10-27 20:16:04,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:04,099 INFO L225 Difference]: With dead ends: 408 [2020-10-27 20:16:04,099 INFO L226 Difference]: Without dead ends: 402 [2020-10-27 20:16:04,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:16:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-27 20:16:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2020-10-27 20:16:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-27 20:16:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 419 transitions. [2020-10-27 20:16:04,239 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 419 transitions. Word has length 376 [2020-10-27 20:16:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:04,240 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 419 transitions. [2020-10-27 20:16:04,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:16:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 419 transitions. [2020-10-27 20:16:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-27 20:16:04,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:04,241 INFO L422 BasicCegarLoop]: trace histogram [290, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:04,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:16:04,242 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1492589041, now seen corresponding path program 38 times [2020-10-27 20:16:04,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:04,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574131331] [2020-10-27 20:16:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:04,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:09,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:09,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-27 20:16:09,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:09,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 20:16:09,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:09,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:16:09,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:09,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 379 [2020-10-27 20:16:09,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:10,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:10,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:10,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:10,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2020-10-27 20:16:10,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574131331] [2020-10-27 20:16:10,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:10,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:16:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353014296] [2020-10-27 20:16:10,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:16:10,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:16:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:16:10,845 INFO L87 Difference]: Start difference. First operand 390 states and 419 transitions. Second operand 33 states. [2020-10-27 20:16:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:15,826 INFO L93 Difference]: Finished difference Result 421 states and 452 transitions. [2020-10-27 20:16:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:16:15,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 389 [2020-10-27 20:16:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:15,830 INFO L225 Difference]: With dead ends: 421 [2020-10-27 20:16:15,830 INFO L226 Difference]: Without dead ends: 415 [2020-10-27 20:16:15,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:16:15,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-27 20:16:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 403. [2020-10-27 20:16:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-27 20:16:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 433 transitions. [2020-10-27 20:16:15,963 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 433 transitions. Word has length 389 [2020-10-27 20:16:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:15,963 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 433 transitions. [2020-10-27 20:16:15,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:16:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 433 transitions. [2020-10-27 20:16:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-27 20:16:15,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:15,965 INFO L422 BasicCegarLoop]: trace histogram [300, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:15,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:16:15,965 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash -891472534, now seen corresponding path program 39 times [2020-10-27 20:16:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:15,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017410299] [2020-10-27 20:16:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:21,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 412 [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 392 [2020-10-27 20:16:21,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:22,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:22,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:22,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 53535 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-27 20:16:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017410299] [2020-10-27 20:16:22,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:22,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:16:22,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825875768] [2020-10-27 20:16:22,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:16:22,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:22,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:16:22,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:16:22,714 INFO L87 Difference]: Start difference. First operand 403 states and 433 transitions. Second operand 34 states. [2020-10-27 20:16:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:27,995 INFO L93 Difference]: Finished difference Result 434 states and 466 transitions. [2020-10-27 20:16:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:16:27,996 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 402 [2020-10-27 20:16:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:27,998 INFO L225 Difference]: With dead ends: 434 [2020-10-27 20:16:27,998 INFO L226 Difference]: Without dead ends: 428 [2020-10-27 20:16:27,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:16:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-27 20:16:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 416. [2020-10-27 20:16:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-27 20:16:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 447 transitions. [2020-10-27 20:16:28,177 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 447 transitions. Word has length 402 [2020-10-27 20:16:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:28,177 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 447 transitions. [2020-10-27 20:16:28,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:16:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 447 transitions. [2020-10-27 20:16:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-10-27 20:16:28,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:28,181 INFO L422 BasicCegarLoop]: trace histogram [310, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:28,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:16:28,181 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1154434705, now seen corresponding path program 40 times [2020-10-27 20:16:28,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:28,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465645651] [2020-10-27 20:16:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 405 [2020-10-27 20:16:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:34,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:34,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:34,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:34,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:34,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:16:34,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:34,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:34,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:34,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58931 backedges. 0 proven. 57226 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2020-10-27 20:16:35,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465645651] [2020-10-27 20:16:35,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:35,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:16:35,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039201735] [2020-10-27 20:16:35,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:16:35,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:16:35,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:16:35,267 INFO L87 Difference]: Start difference. First operand 416 states and 447 transitions. Second operand 35 states. [2020-10-27 20:16:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:40,916 INFO L93 Difference]: Finished difference Result 447 states and 480 transitions. [2020-10-27 20:16:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:16:40,917 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 415 [2020-10-27 20:16:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:40,919 INFO L225 Difference]: With dead ends: 447 [2020-10-27 20:16:40,920 INFO L226 Difference]: Without dead ends: 441 [2020-10-27 20:16:40,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:16:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-27 20:16:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 429. [2020-10-27 20:16:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 20:16:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 461 transitions. [2020-10-27 20:16:41,096 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 461 transitions. Word has length 415 [2020-10-27 20:16:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:41,097 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 461 transitions. [2020-10-27 20:16:41,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:16:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 461 transitions. [2020-10-27 20:16:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-27 20:16:41,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:41,100 INFO L422 BasicCegarLoop]: trace histogram [320, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:41,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:16:41,100 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:41,101 INFO L82 PathProgramCache]: Analyzing trace with hash 659197130, now seen corresponding path program 41 times [2020-10-27 20:16:41,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:41,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144078740] [2020-10-27 20:16:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:46,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:46,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 438 [2020-10-27 20:16:46,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:46,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-27 20:16:46,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:16:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 418 [2020-10-27 20:16:46,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:47,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:47,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:47,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:47,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:47,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:16:47,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:47,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 61040 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2020-10-27 20:16:48,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144078740] [2020-10-27 20:16:48,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:48,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:16:48,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10007473] [2020-10-27 20:16:48,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:16:48,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:48,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:16:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:16:48,222 INFO L87 Difference]: Start difference. First operand 429 states and 461 transitions. Second operand 36 states. [2020-10-27 20:16:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:54,151 INFO L93 Difference]: Finished difference Result 460 states and 494 transitions. [2020-10-27 20:16:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:16:54,152 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 428 [2020-10-27 20:16:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:54,154 INFO L225 Difference]: With dead ends: 460 [2020-10-27 20:16:54,155 INFO L226 Difference]: Without dead ends: 454 [2020-10-27 20:16:54,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:16:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-27 20:16:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 442. [2020-10-27 20:16:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-27 20:16:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 475 transitions. [2020-10-27 20:16:54,364 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 475 transitions. Word has length 428 [2020-10-27 20:16:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:54,365 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 475 transitions. [2020-10-27 20:16:54,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:16:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 475 transitions. [2020-10-27 20:16:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2020-10-27 20:16:54,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:54,368 INFO L422 BasicCegarLoop]: trace histogram [330, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:54,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:16:54,368 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1412623153, now seen corresponding path program 42 times [2020-10-27 20:16:54,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:54,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961085606] [2020-10-27 20:16:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:54,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking...