/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:24:59,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:24:59,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:24:59,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:24:59,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:24:59,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:24:59,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:24:59,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:24:59,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:24:59,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:24:59,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:24:59,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:24:59,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:24:59,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:24:59,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:24:59,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:24:59,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:24:59,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:24:59,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:24:59,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:24:59,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:24:59,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:24:59,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:24:59,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:24:59,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:24:59,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:24:59,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:24:59,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:24:59,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:24:59,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:24:59,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:24:59,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:24:59,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:24:59,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:24:59,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:24:59,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:24:59,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:24:59,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:24:59,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:24:59,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:24:59,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:24:59,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:25:00,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:00,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:00,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:00,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:00,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:00,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:00,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:00,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:00,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:00,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:00,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:00,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:00,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:00,030 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:00,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:00,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:00,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:00,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:00,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:00,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:00,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:00,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:00,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:00,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:00,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:00,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:00,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:00,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:00,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:00,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:00,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:00,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:00,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:00,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:00,451 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:00,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2020-10-26 19:25:00,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1df2ad686/35199df3eb1e48e7838ec2d708b6230f/FLAG1b9af4230 [2020-10-26 19:25:01,260 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:01,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2020-10-26 19:25:01,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1df2ad686/35199df3eb1e48e7838ec2d708b6230f/FLAG1b9af4230 [2020-10-26 19:25:01,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1df2ad686/35199df3eb1e48e7838ec2d708b6230f [2020-10-26 19:25:01,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:01,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:01,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:01,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:01,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:01,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfabece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01, skipping insertion in model container [2020-10-26 19:25:01,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:01,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:01,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:01,830 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:01,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:01,870 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:01,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01 WrapperNode [2020-10-26 19:25:01,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:01,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:01,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:01,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:01,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... [2020-10-26 19:25:01,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:01,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:01,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:01,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:01,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:02,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:02,396 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:02,397 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:25:02,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:02 BoogieIcfgContainer [2020-10-26 19:25:02,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:02,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:02,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:02,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:02,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:01" (1/3) ... [2020-10-26 19:25:02,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddde630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:02, skipping insertion in model container [2020-10-26 19:25:02,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:01" (2/3) ... [2020-10-26 19:25:02,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddde630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:02, skipping insertion in model container [2020-10-26 19:25:02,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:02" (3/3) ... [2020-10-26 19:25:02,410 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2020-10-26 19:25:02,426 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:02,432 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:02,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:02,490 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:02,491 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:02,491 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:02,491 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:02,509 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:02,509 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:02,509 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:02,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-26 19:25:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:25:02,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:02,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:02,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:02,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash -18791634, now seen corresponding path program 1 times [2020-10-26 19:25:02,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:02,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371848630] [2020-10-26 19:25:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:02,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:02,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:02,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:02,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:03,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:03,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:25:03,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:03,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-26 19:25:03,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:03,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:03,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:03,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:03,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:03,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:03,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:25:03,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:03,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:03,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:03,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:03,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:03,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371848630] [2020-10-26 19:25:03,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:03,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:03,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422978709] [2020-10-26 19:25:03,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:03,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:03,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:03,704 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-26 19:25:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:03,898 INFO L93 Difference]: Finished difference Result 62 states and 92 transitions. [2020-10-26 19:25:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:03,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-26 19:25:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:03,911 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:25:03,911 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:25:03,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:25:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 19:25:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:25:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:25:03,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-26 19:25:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:03,977 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:25:03,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:25:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:25:03,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:03,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:03,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:03,979 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159768, now seen corresponding path program 1 times [2020-10-26 19:25:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:03,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614033357] [2020-10-26 19:25:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:04,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:04,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:04,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:04,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:05,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:05,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:25:05,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:05,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-26 19:25:05,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:05,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:05,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:05,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:05,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:05,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:05,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:05,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:25:05,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:05,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:05,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:05,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:05,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:25:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:25:05,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614033357] [2020-10-26 19:25:05,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:05,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:05,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668448063] [2020-10-26 19:25:05,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:05,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:05,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:05,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:05,614 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-10-26 19:25:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:05,748 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-26 19:25:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:05,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-26 19:25:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:05,750 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:25:05,750 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:25:05,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:25:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-26 19:25:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:25:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:25:05,760 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2020-10-26 19:25:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:05,761 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:25:05,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:25:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:25:05,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:05,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:05,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:05,763 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:05,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2050662806, now seen corresponding path program 2 times [2020-10-26 19:25:05,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:05,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060244736] [2020-10-26 19:25:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:05,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:05,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:10,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:25:10,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4456 [2020-10-26 19:25:10,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:10,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:10,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:10,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:10,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:10,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:10,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:10,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:10,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:25:10,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060244736] [2020-10-26 19:25:10,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:10,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:10,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444141251] [2020-10-26 19:25:10,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:10,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:10,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:10,310 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-10-26 19:25:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:10,409 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-26 19:25:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:10,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-26 19:25:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:10,411 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:25:10,411 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:25:10,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:25:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-26 19:25:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:25:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:25:10,421 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-10-26 19:25:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:10,421 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:25:10,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:25:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:25:10,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:10,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:10,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:10,423 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:10,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1849014952, now seen corresponding path program 3 times [2020-10-26 19:25:10,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:10,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204370497] [2020-10-26 19:25:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:15,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:15,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:25:15,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:15,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:15,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:15,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:15,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:15,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:15,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:15,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:15,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:15,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:15,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:15,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:25:15,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:15,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:25:15,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204370497] [2020-10-26 19:25:15,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:15,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:15,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451136001] [2020-10-26 19:25:15,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:15,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:15,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:15,588 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2020-10-26 19:25:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:15,771 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-26 19:25:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:15,772 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-26 19:25:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:15,774 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:25:15,774 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:25:15,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:25:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:25:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:25:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:25:15,794 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2020-10-26 19:25:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:15,794 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:25:15,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:25:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:25:15,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:15,797 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:15,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:15,797 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1815544746, now seen corresponding path program 4 times [2020-10-26 19:25:15,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:15,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800291196] [2020-10-26 19:25:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:15,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:15,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:15,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:15,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:20,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:20,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:25:20,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:20,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:25:20,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:20,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:25:20,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:20,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:25:20,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:20,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:20,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:20,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:20,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:20,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:20,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:25:20,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800291196] [2020-10-26 19:25:20,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:20,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:25:20,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046820859] [2020-10-26 19:25:20,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:25:20,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:25:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:20,947 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-10-26 19:25:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:21,130 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-26 19:25:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:25:21,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-26 19:25:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:21,132 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:25:21,132 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:25:21,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:25:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-26 19:25:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:25:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:25:21,153 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-10-26 19:25:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:21,154 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:25:21,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:25:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:25:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:25:21,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:21,156 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:21,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:25:21,157 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1640122136, now seen corresponding path program 5 times [2020-10-26 19:25:21,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:21,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229744217] [2020-10-26 19:25:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:26,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:26,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:25:26,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:26,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:25:26,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:26,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:25:26,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:26,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:25:26,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:26,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:26,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:26,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:26,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:26,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:26,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:26,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:26,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:26,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:26,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:26,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:25:26,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229744217] [2020-10-26 19:25:26,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:26,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:25:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426620187] [2020-10-26 19:25:26,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:25:26,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:25:26,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:25:26,300 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2020-10-26 19:25:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:26,436 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-26 19:25:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:25:26,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-26 19:25:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:26,438 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:25:26,438 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:25:26,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:25:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:25:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 19:25:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:25:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:25:26,447 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2020-10-26 19:25:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:26,448 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:25:26,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:25:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:25:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:25:26,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:26,450 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:26,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:25:26,450 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash 325196010, now seen corresponding path program 6 times [2020-10-26 19:25:26,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:26,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625925002] [2020-10-26 19:25:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:26,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:26,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:26,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:31,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:25:31,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:31,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:31,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:25:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:31,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:25:31,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:31,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:31,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:31,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:31,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:31,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:31,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:31,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:31,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:31,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:25:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625925002] [2020-10-26 19:25:31,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:31,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:25:31,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597669868] [2020-10-26 19:25:31,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:25:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:25:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:25:31,573 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2020-10-26 19:25:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:31,722 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-26 19:25:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:25:31,722 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-26 19:25:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:31,723 INFO L225 Difference]: With dead ends: 91 [2020-10-26 19:25:31,724 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:25:31,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:25:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:25:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-26 19:25:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:25:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:25:31,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 45 [2020-10-26 19:25:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:31,740 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:25:31,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:25:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:25:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:25:31,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:31,743 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:31,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:25:31,743 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:31,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1104640216, now seen corresponding path program 7 times [2020-10-26 19:25:31,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:31,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78005578] [2020-10-26 19:25:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:31,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:36,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:25:36,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:36,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:25:36,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:36,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:25:36,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:25:36,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:36,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:36,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:36,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:36,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:36,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:36,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:36,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:36,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:36,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-26 19:25:36,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78005578] [2020-10-26 19:25:36,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:36,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:25:36,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706510763] [2020-10-26 19:25:36,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:25:36,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:36,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:25:36,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:25:36,906 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2020-10-26 19:25:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:37,068 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2020-10-26 19:25:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:25:37,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-26 19:25:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:37,070 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:25:37,070 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:25:37,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:25:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:25:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 19:25:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:25:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:25:37,079 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2020-10-26 19:25:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:37,079 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:25:37,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:25:37,080 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:25:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:25:37,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:37,081 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:37,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:25:37,081 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash -142696918, now seen corresponding path program 8 times [2020-10-26 19:25:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:37,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358811696] [2020-10-26 19:25:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:37,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:37,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:37,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:37,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:42,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:25:42,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:42,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:25:42,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:25:42,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:42,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:25:42,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:42,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:42,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:42,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:42,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:42,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:42,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:42,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:42,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:42,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:42,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 19:25:42,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358811696] [2020-10-26 19:25:42,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:42,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:25:42,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419903603] [2020-10-26 19:25:42,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:25:42,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:42,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:25:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:25:42,283 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2020-10-26 19:25:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:42,496 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-10-26 19:25:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:25:42,496 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-26 19:25:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:42,497 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:25:42,498 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:25:42,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:25:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:25:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-26 19:25:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:25:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:25:42,519 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 53 [2020-10-26 19:25:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:42,519 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:25:42,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:25:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:25:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:25:42,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:42,524 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:42,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:25:42,524 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:42,525 INFO L82 PathProgramCache]: Analyzing trace with hash 958276968, now seen corresponding path program 9 times [2020-10-26 19:25:42,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:42,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443044283] [2020-10-26 19:25:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:47,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:25:47,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:47,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:25:47,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:47,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:25:47,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:47,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:25:47,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:47,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:47,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:47,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:47,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:47,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:47,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:47,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-26 19:25:47,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443044283] [2020-10-26 19:25:47,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:47,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:25:47,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956538774] [2020-10-26 19:25:47,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:25:47,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:25:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:25:47,728 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-10-26 19:25:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:47,973 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-10-26 19:25:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:25:47,973 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-26 19:25:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:47,974 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:25:47,974 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:25:47,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:25:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:25:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:25:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:25:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:25:47,997 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 57 [2020-10-26 19:25:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:47,998 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:25:47,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:25:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:25:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:25:47,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:47,999 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:47,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:25:47,999 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1975817066, now seen corresponding path program 10 times [2020-10-26 19:25:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:48,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944699765] [2020-10-26 19:25:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:48,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:53,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:53,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:25:53,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:53,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:25:53,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:25:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:25:53,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:53,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:53,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:53,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:53,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:53,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:53,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:53,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:53,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:53,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:53,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:53,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-26 19:25:53,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944699765] [2020-10-26 19:25:53,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:53,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:25:53,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671863335] [2020-10-26 19:25:53,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:25:53,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:53,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:25:53,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:25:53,217 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 14 states. [2020-10-26 19:25:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:53,448 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-26 19:25:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:25:53,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-26 19:25:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:53,450 INFO L225 Difference]: With dead ends: 119 [2020-10-26 19:25:53,450 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:25:53,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:25:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:25:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-26 19:25:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:25:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:25:53,471 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 61 [2020-10-26 19:25:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:53,472 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:25:53,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:25:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:25:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:25:53,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:53,473 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:53,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:25:53,473 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -381250648, now seen corresponding path program 11 times [2020-10-26 19:25:53,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:53,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128308404] [2020-10-26 19:25:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:53,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:53,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:25:58,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:58,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:58,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:58,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:58,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:58,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:58,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:58,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-26 19:25:58,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128308404] [2020-10-26 19:25:58,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:58,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:25:58,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170871434] [2020-10-26 19:25:58,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:25:58,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:58,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:25:58,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:25:58,728 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 15 states. [2020-10-26 19:25:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:58,963 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-10-26 19:25:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:25:58,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-26 19:25:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:58,965 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:25:58,966 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:25:58,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:25:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:25:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-26 19:25:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:25:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:25:58,977 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 65 [2020-10-26 19:25:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:58,979 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:25:58,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:25:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:25:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:25:58,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:58,980 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:58,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:25:58,981 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1282144426, now seen corresponding path program 12 times [2020-10-26 19:25:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:58,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194851238] [2020-10-26 19:25:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:59,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:04,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:26:04,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:04,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:26:04,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:04,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:04,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:04,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:04,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:04,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:04,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:04,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:04,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:04,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:04,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:04,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-26 19:26:04,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194851238] [2020-10-26 19:26:04,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:04,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514169771] [2020-10-26 19:26:04,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:04,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:04,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:04,215 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 16 states. [2020-10-26 19:26:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:04,539 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2020-10-26 19:26:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:04,540 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-26 19:26:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:04,541 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:26:04,541 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:26:04,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:26:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-26 19:26:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:26:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:26:04,565 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 69 [2020-10-26 19:26:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:04,565 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:26:04,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:26:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:26:04,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:04,569 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:04,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:04,570 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:04,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1748381208, now seen corresponding path program 13 times [2020-10-26 19:26:04,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:04,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803548499] [2020-10-26 19:26:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:04,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:09,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:09,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:09,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:09,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:09,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:09,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:09,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:09,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:09,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:09,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-10-26 19:26:09,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803548499] [2020-10-26 19:26:09,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:09,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:09,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859337867] [2020-10-26 19:26:09,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:09,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:09,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:09,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:09,897 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-10-26 19:26:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:10,207 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2020-10-26 19:26:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:10,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-26 19:26:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:10,209 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:26:10,209 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:26:10,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:26:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:26:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:26:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:26:10,225 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2020-10-26 19:26:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:10,226 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:26:10,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:26:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:26:10,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:10,228 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:10,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:10,228 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash 447532522, now seen corresponding path program 14 times [2020-10-26 19:26:10,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:10,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322876248] [2020-10-26 19:26:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:10,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:15,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:26:15,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:15,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:26:15,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:15,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:15,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:15,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:15,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:15,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:15,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:15,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:15,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:15,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:15,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:15,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-26 19:26:15,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322876248] [2020-10-26 19:26:15,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:15,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:15,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356752006] [2020-10-26 19:26:15,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:15,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:15,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:15,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:15,515 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 18 states. [2020-10-26 19:26:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:15,772 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2020-10-26 19:26:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:15,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-10-26 19:26:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:15,774 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:26:15,774 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:26:15,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:26:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-26 19:26:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:26:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:26:15,787 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 77 [2020-10-26 19:26:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:15,787 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:26:15,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:26:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:26:15,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:15,789 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:15,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:15,790 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:15,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2093998120, now seen corresponding path program 15 times [2020-10-26 19:26:15,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:15,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868484634] [2020-10-26 19:26:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:15,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:26:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:21,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:21,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:21,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:21,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:21,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:21,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:21,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:21,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:21,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-26 19:26:21,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868484634] [2020-10-26 19:26:21,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:21,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:21,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567927766] [2020-10-26 19:26:21,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:21,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:21,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:21,140 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 19 states. [2020-10-26 19:26:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:21,422 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2020-10-26 19:26:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:21,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-26 19:26:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:21,425 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:26:21,425 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:26:21,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:26:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-26 19:26:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:26:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:26:21,432 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 81 [2020-10-26 19:26:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:21,433 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:26:21,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:26:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:26:21,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:21,434 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:21,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:21,434 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash -524348630, now seen corresponding path program 16 times [2020-10-26 19:26:21,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:21,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788568525] [2020-10-26 19:26:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:21,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:26,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:26:26,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:26:26,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:26:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:26:26,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:26,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:26,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:26,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:26,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:26,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:26,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:26,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:26,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:26,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:26,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-26 19:26:26,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788568525] [2020-10-26 19:26:26,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:26,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:26:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557455105] [2020-10-26 19:26:26,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:26:26,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:26:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:26,807 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-10-26 19:26:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:27,106 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-26 19:26:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:26:27,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-26 19:26:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:27,108 INFO L225 Difference]: With dead ends: 161 [2020-10-26 19:26:27,108 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:26:27,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:26:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-26 19:26:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:26:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:26:27,116 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 85 [2020-10-26 19:26:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:27,116 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:26:27,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:26:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:26:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:26:27,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:27,118 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:27,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:26:27,118 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1082081688, now seen corresponding path program 17 times [2020-10-26 19:26:27,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:27,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274047594] [2020-10-26 19:26:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:27,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:32,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:26:32,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:32,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:26:32,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:26:32,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:32,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:26:32,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:32,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:32,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:32,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:32,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:32,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-10-26 19:26:32,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274047594] [2020-10-26 19:26:32,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:32,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:26:32,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487813935] [2020-10-26 19:26:32,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:26:32,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:32,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:26:32,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:32,499 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 21 states. [2020-10-26 19:26:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:32,724 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2020-10-26 19:26:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:26:32,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-26 19:26:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:32,725 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:26:32,725 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:26:32,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:26:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-26 19:26:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:26:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:26:32,734 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 89 [2020-10-26 19:26:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:32,734 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:26:32,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:26:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:26:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:26:32,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:32,736 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:32,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:26:32,736 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2145044586, now seen corresponding path program 18 times [2020-10-26 19:26:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311462060] [2020-10-26 19:26:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:37,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:26:37,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:37,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:37,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:26:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:26:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:38,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:38,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:38,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:38,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:38,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:38,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:38,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:38,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:38,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:38,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:38,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-10-26 19:26:38,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311462060] [2020-10-26 19:26:38,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:38,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:26:38,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158304245] [2020-10-26 19:26:38,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:26:38,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:38,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:26:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:26:38,139 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 22 states. [2020-10-26 19:26:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:38,446 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-10-26 19:26:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:26:38,446 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-10-26 19:26:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:38,447 INFO L225 Difference]: With dead ends: 175 [2020-10-26 19:26:38,447 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:26:38,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:26:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:26:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:26:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:26:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:26:38,459 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 93 [2020-10-26 19:26:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:38,460 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:26:38,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:26:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:26:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:26:38,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:38,461 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:38,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:26:38,461 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash -167482200, now seen corresponding path program 19 times [2020-10-26 19:26:38,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:38,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795755613] [2020-10-26 19:26:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:38,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:38,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:43,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:26:43,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:43,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:26:43,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:26:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:26:43,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:43,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:43,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:43,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:43,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:43,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:43,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:43,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-26 19:26:43,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795755613] [2020-10-26 19:26:43,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:43,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:26:43,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047576649] [2020-10-26 19:26:43,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:26:43,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:26:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:26:43,898 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-10-26 19:26:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:44,218 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2020-10-26 19:26:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:26:44,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-26 19:26:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:44,220 INFO L225 Difference]: With dead ends: 182 [2020-10-26 19:26:44,220 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:26:44,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:26:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:26:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-26 19:26:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:26:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:26:44,228 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 97 [2020-10-26 19:26:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:44,228 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:26:44,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:26:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:26:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:26:44,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:44,230 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:44,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:26:44,230 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash 976743850, now seen corresponding path program 20 times [2020-10-26 19:26:44,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:44,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820885066] [2020-10-26 19:26:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:44,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:49,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:26:49,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:49,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:49,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:49,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:49,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:49,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:49,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:49,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:49,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-26 19:26:49,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820885066] [2020-10-26 19:26:49,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:49,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:26:49,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64378674] [2020-10-26 19:26:49,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:26:49,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:26:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:26:49,706 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 24 states. [2020-10-26 19:26:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:50,121 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-10-26 19:26:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:26:50,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2020-10-26 19:26:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:50,123 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:26:50,123 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:26:50,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:26:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:26:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-26 19:26:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:26:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:26:50,139 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 101 [2020-10-26 19:26:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:50,140 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:26:50,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:26:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:26:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:26:50,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:50,142 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:50,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:26:50,142 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1518146840, now seen corresponding path program 21 times [2020-10-26 19:26:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:50,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115022740] [2020-10-26 19:26:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:50,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:55,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:55,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:55,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:55,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:55,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:55,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:55,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:55,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:55,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:55,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-10-26 19:26:55,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115022740] [2020-10-26 19:26:55,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:55,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:26:55,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200483723] [2020-10-26 19:26:55,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:26:55,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:55,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:26:55,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:26:55,670 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 25 states. [2020-10-26 19:26:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:56,005 INFO L93 Difference]: Finished difference Result 196 states and 207 transitions. [2020-10-26 19:26:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:26:56,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2020-10-26 19:26:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:56,007 INFO L225 Difference]: With dead ends: 196 [2020-10-26 19:26:56,007 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:26:56,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:26:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:26:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-26 19:26:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:26:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:26:56,016 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 105 [2020-10-26 19:26:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:56,016 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:26:56,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:26:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:26:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:26:56,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:56,018 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:56,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:26:56,018 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 856589034, now seen corresponding path program 22 times [2020-10-26 19:26:56,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:56,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963955187] [2020-10-26 19:26:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:01,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:27:01,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:27:01,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:01,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:01,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:01,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:01,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:01,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2020-10-26 19:27:01,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963955187] [2020-10-26 19:27:01,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:01,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:01,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697739978] [2020-10-26 19:27:01,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:01,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:01,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:01,563 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 26 states. [2020-10-26 19:27:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:01,919 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-10-26 19:27:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:01,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 109 [2020-10-26 19:27:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:01,921 INFO L225 Difference]: With dead ends: 203 [2020-10-26 19:27:01,921 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:27:01,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:27:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-26 19:27:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:27:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:27:01,934 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 109 [2020-10-26 19:27:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:01,934 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:27:01,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:27:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:27:01,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:01,936 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:01,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:01,936 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:01,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1037813464, now seen corresponding path program 23 times [2020-10-26 19:27:01,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:01,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776103481] [2020-10-26 19:27:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:06,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:27:06,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:06,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:06,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:07,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:07,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:07,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:07,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:07,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2020-10-26 19:27:07,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776103481] [2020-10-26 19:27:07,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:07,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:07,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36344946] [2020-10-26 19:27:07,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:07,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:07,497 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 27 states. [2020-10-26 19:27:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:07,863 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2020-10-26 19:27:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:07,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2020-10-26 19:27:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:07,865 INFO L225 Difference]: With dead ends: 210 [2020-10-26 19:27:07,865 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:27:07,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:27:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-26 19:27:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:27:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:27:07,876 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 113 [2020-10-26 19:27:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:07,878 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:27:07,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:27:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:27:07,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:07,880 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:07,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:07,881 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash -292124630, now seen corresponding path program 24 times [2020-10-26 19:27:07,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:07,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810766013] [2020-10-26 19:27:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:07,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:12,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:13,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:13,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:13,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:13,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:13,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:13,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:13,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:13,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-26 19:27:13,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810766013] [2020-10-26 19:27:13,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:13,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486729136] [2020-10-26 19:27:13,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:13,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:13,488 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 28 states. [2020-10-26 19:27:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:13,914 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2020-10-26 19:27:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:27:13,918 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2020-10-26 19:27:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:13,919 INFO L225 Difference]: With dead ends: 217 [2020-10-26 19:27:13,919 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:27:13,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:27:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-26 19:27:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:27:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:27:13,929 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 117 [2020-10-26 19:27:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:13,929 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:27:13,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:27:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:27:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:27:13,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:13,931 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:13,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:27:13,931 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash 789600104, now seen corresponding path program 25 times [2020-10-26 19:27:13,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:13,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9147092] [2020-10-26 19:27:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:13,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:18,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:18,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:27:18,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:18,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:27:18,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:18,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:27:18,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:18,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:27:18,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:19,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:19,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:19,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:19,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:19,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:27:19,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:19,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-26 19:27:19,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9147092] [2020-10-26 19:27:19,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:19,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:27:19,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263479303] [2020-10-26 19:27:19,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:27:19,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:19,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:27:19,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:19,568 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 29 states. [2020-10-26 19:27:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:19,897 INFO L93 Difference]: Finished difference Result 224 states and 235 transitions. [2020-10-26 19:27:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:27:19,897 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 121 [2020-10-26 19:27:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:19,899 INFO L225 Difference]: With dead ends: 224 [2020-10-26 19:27:19,899 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:27:19,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:27:19,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-26 19:27:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:27:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:27:19,907 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 121 [2020-10-26 19:27:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:19,907 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:27:19,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:27:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:27:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:27:19,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:19,908 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:19,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:27:19,909 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash -771228310, now seen corresponding path program 26 times [2020-10-26 19:27:19,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:19,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889144889] [2020-10-26 19:27:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:19,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:24,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:27:24,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:24,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:27:24,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:27:24,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:24,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:27:24,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:25,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:25,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:25,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:25,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:25,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:25,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2020-10-26 19:27:25,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889144889] [2020-10-26 19:27:25,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:25,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:27:25,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689536238] [2020-10-26 19:27:25,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:27:25,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:27:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:25,585 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 30 states. [2020-10-26 19:27:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:25,925 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2020-10-26 19:27:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:27:25,926 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 125 [2020-10-26 19:27:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:25,928 INFO L225 Difference]: With dead ends: 231 [2020-10-26 19:27:25,928 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:27:25,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:27:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-26 19:27:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:27:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:27:25,935 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2020-10-26 19:27:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:25,936 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:27:25,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:27:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:27:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 19:27:25,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:25,937 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:25,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:27:25,937 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1047479720, now seen corresponding path program 27 times [2020-10-26 19:27:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:25,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697020086] [2020-10-26 19:27:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:27:30,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-10-26 19:27:31,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697020086] [2020-10-26 19:27:31,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:31,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:27:31,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970042844] [2020-10-26 19:27:31,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:27:31,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:27:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:31,623 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 31 states. [2020-10-26 19:27:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:32,122 INFO L93 Difference]: Finished difference Result 238 states and 249 transitions. [2020-10-26 19:27:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:27:32,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 129 [2020-10-26 19:27:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:32,124 INFO L225 Difference]: With dead ends: 238 [2020-10-26 19:27:32,124 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:27:32,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:27:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-26 19:27:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:27:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:27:32,134 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 129 [2020-10-26 19:27:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:32,134 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:27:32,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:27:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:27:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:27:32,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:32,135 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:32,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:27:32,135 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1550130518, now seen corresponding path program 28 times [2020-10-26 19:27:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:32,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794579259] [2020-10-26 19:27:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:32,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:37,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:27:37,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:38,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:38,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:38,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:38,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:38,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:38,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:38,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2020-10-26 19:27:38,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794579259] [2020-10-26 19:27:38,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:38,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:27:38,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629111251] [2020-10-26 19:27:38,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:27:38,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:27:38,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:27:38,031 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 32 states. [2020-10-26 19:27:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:38,450 INFO L93 Difference]: Finished difference Result 245 states and 256 transitions. [2020-10-26 19:27:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:27:38,451 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 133 [2020-10-26 19:27:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:38,453 INFO L225 Difference]: With dead ends: 245 [2020-10-26 19:27:38,453 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:27:38,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:27:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:27:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-26 19:27:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:27:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-26 19:27:38,463 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 133 [2020-10-26 19:27:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:38,464 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-26 19:27:38,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:27:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-26 19:27:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:27:38,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:38,465 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:38,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:27:38,465 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:38,466 INFO L82 PathProgramCache]: Analyzing trace with hash 828965864, now seen corresponding path program 29 times [2020-10-26 19:27:38,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:38,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914527797] [2020-10-26 19:27:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:38,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:27:43,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:44,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:44,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:44,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:44,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:44,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:44,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2020-10-26 19:27:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914527797] [2020-10-26 19:27:44,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:44,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:27:44,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981757384] [2020-10-26 19:27:44,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:27:44,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:27:44,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:27:44,408 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 33 states. [2020-10-26 19:27:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:44,835 INFO L93 Difference]: Finished difference Result 252 states and 263 transitions. [2020-10-26 19:27:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:27:44,836 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 137 [2020-10-26 19:27:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:44,837 INFO L225 Difference]: With dead ends: 252 [2020-10-26 19:27:44,837 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:27:44,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:27:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:27:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-26 19:27:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:27:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-26 19:27:44,845 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2020-10-26 19:27:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:44,846 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-26 19:27:44,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:27:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-26 19:27:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 19:27:44,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:44,848 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:44,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:27:44,851 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:44,852 INFO L82 PathProgramCache]: Analyzing trace with hash 176633834, now seen corresponding path program 30 times [2020-10-26 19:27:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:44,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396427368] [2020-10-26 19:27:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:44,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:49,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 19:27:49,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:27:49,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:27:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:27:49,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:50,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:50,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:50,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-10-26 19:27:50,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396427368] [2020-10-26 19:27:50,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:50,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:27:50,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357422344] [2020-10-26 19:27:50,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:27:50,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:27:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:27:50,721 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 34 states. [2020-10-26 19:27:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:51,278 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2020-10-26 19:27:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:27:51,279 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 141 [2020-10-26 19:27:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:51,280 INFO L225 Difference]: With dead ends: 259 [2020-10-26 19:27:51,280 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:27:51,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:27:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:27:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-26 19:27:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:27:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-10-26 19:27:51,288 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2020-10-26 19:27:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:51,289 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-10-26 19:27:51,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:27:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-10-26 19:27:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 19:27:51,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:51,290 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:51,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:27:51,290 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1205497304, now seen corresponding path program 31 times [2020-10-26 19:27:51,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:51,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435978670] [2020-10-26 19:27:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:51,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:56,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-26 19:27:56,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:56,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:56,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:27:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:27:56,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:57,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:57,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:57,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:57,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:57,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:57,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:57,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2020-10-26 19:27:57,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435978670] [2020-10-26 19:27:57,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:57,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:27:57,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302980000] [2020-10-26 19:27:57,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:27:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:27:57,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:27:57,158 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 35 states. [2020-10-26 19:27:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:57,725 INFO L93 Difference]: Finished difference Result 266 states and 277 transitions. [2020-10-26 19:27:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:27:57,725 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-26 19:27:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:57,727 INFO L225 Difference]: With dead ends: 266 [2020-10-26 19:27:57,728 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:27:57,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:27:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:27:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-26 19:27:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:27:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-10-26 19:27:57,737 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 145 [2020-10-26 19:27:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:57,737 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-10-26 19:27:57,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:27:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-10-26 19:27:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-26 19:27:57,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:57,739 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:57,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:27:57,739 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash 251985194, now seen corresponding path program 32 times [2020-10-26 19:27:57,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:57,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422081682] [2020-10-26 19:27:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:57,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:58,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:03,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:03,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:03,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:03,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:03,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:03,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:03,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:03,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:03,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:03,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2020-10-26 19:28:03,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422081682] [2020-10-26 19:28:03,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:03,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:03,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704883788] [2020-10-26 19:28:03,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:03,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:03,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:03,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:03,714 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 36 states. [2020-10-26 19:28:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:04,287 INFO L93 Difference]: Finished difference Result 273 states and 284 transitions. [2020-10-26 19:28:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:28:04,287 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 149 [2020-10-26 19:28:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:04,288 INFO L225 Difference]: With dead ends: 273 [2020-10-26 19:28:04,288 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:28:04,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:28:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-26 19:28:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-26 19:28:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2020-10-26 19:28:04,301 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 149 [2020-10-26 19:28:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:04,301 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2020-10-26 19:28:04,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:28:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2020-10-26 19:28:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 19:28:04,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:04,303 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:04,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:28:04,303 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1909256296, now seen corresponding path program 33 times [2020-10-26 19:28:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:04,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888138008] [2020-10-26 19:28:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:04,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:04,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:09,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 19:28:09,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:09,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:28:09,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:28:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:28:09,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:10,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:10,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:10,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:10,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:10,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:10,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:10,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-10-26 19:28:10,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888138008] [2020-10-26 19:28:10,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:10,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:28:10,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580354153] [2020-10-26 19:28:10,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:28:10,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:28:10,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:10,344 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 37 states. [2020-10-26 19:28:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:10,811 INFO L93 Difference]: Finished difference Result 280 states and 291 transitions. [2020-10-26 19:28:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:28:10,813 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 153 [2020-10-26 19:28:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:10,814 INFO L225 Difference]: With dead ends: 280 [2020-10-26 19:28:10,814 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:28:10,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:28:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-26 19:28:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:28:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-26 19:28:10,824 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2020-10-26 19:28:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:10,824 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-26 19:28:10,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:28:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-26 19:28:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:28:10,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:10,826 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:10,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:28:10,826 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1706282390, now seen corresponding path program 34 times [2020-10-26 19:28:10,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:10,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430427370] [2020-10-26 19:28:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:10,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:11,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:15,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:28:15,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:15,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:28:15,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:28:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:28:15,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:16,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:16,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:16,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:16,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2020-10-26 19:28:16,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430427370] [2020-10-26 19:28:16,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:16,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:28:16,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592530399] [2020-10-26 19:28:16,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:28:16,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:16,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:28:16,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:16,920 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 38 states. [2020-10-26 19:28:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:17,329 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2020-10-26 19:28:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:28:17,330 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 157 [2020-10-26 19:28:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:17,331 INFO L225 Difference]: With dead ends: 287 [2020-10-26 19:28:17,331 INFO L226 Difference]: Without dead ends: 166 [2020-10-26 19:28:17,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-26 19:28:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-26 19:28:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-26 19:28:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2020-10-26 19:28:17,341 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 157 [2020-10-26 19:28:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:17,341 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2020-10-26 19:28:17,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:28:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2020-10-26 19:28:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-26 19:28:17,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:17,343 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:17,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:28:17,344 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1820794536, now seen corresponding path program 35 times [2020-10-26 19:28:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:17,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958841861] [2020-10-26 19:28:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:17,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:17,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:28:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:23,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:23,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:23,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:23,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:23,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:23,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:23,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:23,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-26 19:28:23,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958841861] [2020-10-26 19:28:23,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:23,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:28:23,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226722428] [2020-10-26 19:28:23,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:28:23,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:23,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:28:23,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:23,468 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 39 states. [2020-10-26 19:28:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:23,968 INFO L93 Difference]: Finished difference Result 294 states and 305 transitions. [2020-10-26 19:28:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:28:23,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 161 [2020-10-26 19:28:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:23,970 INFO L225 Difference]: With dead ends: 294 [2020-10-26 19:28:23,970 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:28:23,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:28:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-26 19:28:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:28:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-10-26 19:28:23,979 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2020-10-26 19:28:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:23,980 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-10-26 19:28:23,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:28:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-10-26 19:28:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-26 19:28:23,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:23,981 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:23,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:28:23,981 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash -158017622, now seen corresponding path program 36 times [2020-10-26 19:28:23,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:23,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972840984] [2020-10-26 19:28:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:24,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:28:29,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:30,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:30,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:30,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:30,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:30,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:30,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:30,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:30,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:30,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:30,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:30,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2020-10-26 19:28:30,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972840984] [2020-10-26 19:28:30,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:30,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:28:30,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955514145] [2020-10-26 19:28:30,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:28:30,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:28:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:28:30,237 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 40 states. [2020-10-26 19:28:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:30,861 INFO L93 Difference]: Finished difference Result 301 states and 312 transitions. [2020-10-26 19:28:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:28:30,862 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2020-10-26 19:28:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:30,863 INFO L225 Difference]: With dead ends: 301 [2020-10-26 19:28:30,863 INFO L226 Difference]: Without dead ends: 174 [2020-10-26 19:28:30,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:28:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-26 19:28:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-26 19:28:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:28:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2020-10-26 19:28:30,872 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2020-10-26 19:28:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:30,873 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2020-10-26 19:28:30,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:28:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2020-10-26 19:28:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-26 19:28:30,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:30,874 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:30,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:28:30,875 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1518592792, now seen corresponding path program 37 times [2020-10-26 19:28:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:30,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352300763] [2020-10-26 19:28:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:35,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:28:35,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:37,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:37,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:37,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:37,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:37,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:37,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2020-10-26 19:28:37,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352300763] [2020-10-26 19:28:37,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:37,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:28:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783579675] [2020-10-26 19:28:37,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:28:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:37,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:28:37,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:28:37,130 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 41 states. [2020-10-26 19:28:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:37,832 INFO L93 Difference]: Finished difference Result 308 states and 319 transitions. [2020-10-26 19:28:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:28:37,833 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 169 [2020-10-26 19:28:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:37,835 INFO L225 Difference]: With dead ends: 308 [2020-10-26 19:28:37,835 INFO L226 Difference]: Without dead ends: 178 [2020-10-26 19:28:37,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:28:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-26 19:28:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-26 19:28:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:28:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-10-26 19:28:37,845 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2020-10-26 19:28:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:37,845 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-10-26 19:28:37,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:28:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-10-26 19:28:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 19:28:37,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:37,847 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:37,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:28:37,847 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1326902506, now seen corresponding path program 38 times [2020-10-26 19:28:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:37,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538862780] [2020-10-26 19:28:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:37,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:42,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:28:42,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:28:42,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:42,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:28:42,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:42,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:28:42,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:44,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:44,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:44,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:44,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:44,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:44,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:44,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2223 trivial. 0 not checked. [2020-10-26 19:28:44,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538862780] [2020-10-26 19:28:44,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:44,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:28:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050385825] [2020-10-26 19:28:44,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:28:44,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:28:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:28:44,152 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 42 states. [2020-10-26 19:28:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:44,676 INFO L93 Difference]: Finished difference Result 315 states and 326 transitions. [2020-10-26 19:28:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:28:44,676 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 173 [2020-10-26 19:28:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:44,678 INFO L225 Difference]: With dead ends: 315 [2020-10-26 19:28:44,678 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:28:44,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:28:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:28:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-26 19:28:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-26 19:28:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-10-26 19:28:44,686 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 173 [2020-10-26 19:28:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:44,687 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-10-26 19:28:44,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:28:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-10-26 19:28:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 19:28:44,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:44,688 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:44,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:28:44,688 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1999377624, now seen corresponding path program 39 times [2020-10-26 19:28:44,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:44,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023284211] [2020-10-26 19:28:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:49,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:49,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-26 19:28:49,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:49,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:28:49,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:28:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:28:49,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:51,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:51,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:51,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:51,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:51,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:51,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:51,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:51,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:51,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:51,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2020-10-26 19:28:51,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023284211] [2020-10-26 19:28:51,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:51,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:28:51,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464623458] [2020-10-26 19:28:51,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:28:51,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:28:51,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:28:51,090 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 43 states. [2020-10-26 19:28:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:51,808 INFO L93 Difference]: Finished difference Result 322 states and 333 transitions. [2020-10-26 19:28:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:28:51,809 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 177 [2020-10-26 19:28:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:51,810 INFO L225 Difference]: With dead ends: 322 [2020-10-26 19:28:51,811 INFO L226 Difference]: Without dead ends: 186 [2020-10-26 19:28:51,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:28:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-26 19:28:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-26 19:28:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-26 19:28:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-10-26 19:28:51,820 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 177 [2020-10-26 19:28:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:51,821 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-10-26 19:28:51,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:28:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-10-26 19:28:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 19:28:51,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:51,822 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:51,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:28:51,822 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:51,823 INFO L82 PathProgramCache]: Analyzing trace with hash 805990954, now seen corresponding path program 40 times [2020-10-26 19:28:51,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:51,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041304282] [2020-10-26 19:28:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:52,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:52,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:56,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:58,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:58,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:58,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:58,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2020-10-26 19:28:58,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041304282] [2020-10-26 19:28:58,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:28:58,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828678562] [2020-10-26 19:28:58,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:28:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:28:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:28:58,290 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 44 states.