/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:46:46,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:46:46,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:46:46,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:46:46,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:46:46,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:46:46,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:46:46,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:46:46,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:46:46,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:46:46,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:46:46,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:46:46,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:46:46,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:46:46,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:46:46,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:46:46,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:46:46,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:46:46,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:46:46,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:46:46,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:46:46,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:46:46,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:46:46,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:46:46,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:46:46,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:46:46,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:46:46,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:46:46,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:46:46,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 14:46:46,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:46:46,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:46:46,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:46:46,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:46:46,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:46:46,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:46:46,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:46:46,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:46:46,423 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:46:46,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:46:46,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:46:46,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:46:46,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:46:46,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:46:46,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:46:46,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:46:46,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:46:46,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:46:46,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:46:46,426 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:46:46,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:46:46,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:46:46,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:46:46,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:46:46,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:46:46,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:46:46,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:46:46,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:46:46,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:46:46,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:46:46,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:46:46,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:46:46,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:46:46,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:46:46,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:46:46,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:46:46,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:46:46,875 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:46:46,875 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:46:46,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-10-27 14:46:46,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0518d2d2e/246a8c1e4eba42bbbfb8ccdddb7d4ae4/FLAGf122c7a8e [2020-10-27 14:46:47,638 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:46:47,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-10-27 14:46:47,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0518d2d2e/246a8c1e4eba42bbbfb8ccdddb7d4ae4/FLAGf122c7a8e [2020-10-27 14:46:47,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0518d2d2e/246a8c1e4eba42bbbfb8ccdddb7d4ae4 [2020-10-27 14:46:47,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:46:47,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:46:47,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:46:47,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:46:47,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:46:47,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:46:47" (1/1) ... [2020-10-27 14:46:47,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b33fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:47, skipping insertion in model container [2020-10-27 14:46:47,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:46:47" (1/1) ... [2020-10-27 14:46:47,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:46:48,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:46:48,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:46:48,269 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:46:48,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:46:48,312 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:46:48,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48 WrapperNode [2020-10-27 14:46:48,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:46:48,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:46:48,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:46:48,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:46:48,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:46:48,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:46:48,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:46:48,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:46:48,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:46:48,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:46:48,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:46:48,449 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:46:48,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:46:48,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:46:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:46:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:46:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:46:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:46:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:46:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:46:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:46:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:46:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:46:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:46:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:46:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:46:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:46:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:46:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:46:48,916 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:46:48,916 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:46:48,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:46:48 BoogieIcfgContainer [2020-10-27 14:46:48,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:46:48,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:46:48,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:46:48,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:46:48,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:46:47" (1/3) ... [2020-10-27 14:46:48,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462154f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:46:48, skipping insertion in model container [2020-10-27 14:46:48,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (2/3) ... [2020-10-27 14:46:48,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462154f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:46:48, skipping insertion in model container [2020-10-27 14:46:48,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:46:48" (3/3) ... [2020-10-27 14:46:48,928 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2020-10-27 14:46:48,942 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:46:48,948 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:46:48,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:46:48,995 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:46:48,995 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:46:48,995 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:46:48,996 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:46:48,996 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:46:48,996 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:46:48,996 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:46:48,996 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:46:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-27 14:46:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 14:46:49,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:49,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:49,026 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:49,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1680670433, now seen corresponding path program 1 times [2020-10-27 14:46:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:49,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791604395] [2020-10-27 14:46:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:49,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:49,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 14:46:49,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:46:49,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-27 14:46:49,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:46:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:46:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:46:49,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:49,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:49,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:49,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:49,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:49,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 14:46:49,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:49,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:49,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:49,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:49,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:49,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791604395] [2020-10-27 14:46:49,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:46:49,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:46:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647557027] [2020-10-27 14:46:49,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:46:49,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:46:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:46:49,692 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-27 14:46:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:49,864 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-10-27 14:46:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:46:49,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 14:46:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:49,876 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:46:49,876 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 14:46:49,880 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 [2020-10-27 14:46:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 14:46:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-27 14:46:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:46:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-27 14:46:49,929 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-27 14:46:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:49,930 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-27 14:46:49,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:46:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-27 14:46:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:46:49,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:49,932 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:49,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:46:49,933 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:49,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1691183649, now seen corresponding path program 1 times [2020-10-27 14:46:49,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:49,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782043811] [2020-10-27 14:46:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:50,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:50,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:51,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:46:51,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:46:51,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1678 [2020-10-27 14:46:51,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:51,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:46:51,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 14:46:51,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:46:51,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:51,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:51,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:51,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:51,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:51,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:46:51,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:51,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:51,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:46:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:46:51,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782043811] [2020-10-27 14:46:51,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:51,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:46:51,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297748041] [2020-10-27 14:46:51,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:46:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:51,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:46:51,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:46:51,764 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-27 14:46:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:51,953 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-27 14:46:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:46:51,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:46:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:51,955 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:46:51,955 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:46:51,957 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 [2020-10-27 14:46:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:46:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-27 14:46:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:46:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-27 14:46:51,966 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 24 [2020-10-27 14:46:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:51,967 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-27 14:46:51,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:46:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-27 14:46:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:46:51,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:51,968 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:51,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:46:51,969 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:51,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash -803454921, now seen corresponding path program 2 times [2020-10-27 14:46:51,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:51,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811832600] [2020-10-27 14:46:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:51,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:56,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:56,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:46:56,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:46:56,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:46:56,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:46:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:46:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:46:56,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:57,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:57,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:57,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:57,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:57,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:57,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:46:57,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:46:57,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811832600] [2020-10-27 14:46:57,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:57,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:46:57,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141032292] [2020-10-27 14:46:57,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:46:57,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:46:57,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:46:57,093 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2020-10-27 14:46:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:57,274 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-10-27 14:46:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:46:57,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 14:46:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:57,277 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:46:57,277 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:46:57,278 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 [2020-10-27 14:46:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:46:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-27 14:46:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:46:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-27 14:46:57,288 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 32 [2020-10-27 14:46:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:57,288 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-27 14:46:57,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:46:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-27 14:46:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:46:57,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:57,291 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:57,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:46:57,292 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1387868639, now seen corresponding path program 3 times [2020-10-27 14:46:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:57,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910235981] [2020-10-27 14:46:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:57,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:57,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:01,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:01,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:02,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:47:02,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:47:02,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:47:02,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:02,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:47:02,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:47:02,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:47:02,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:02,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:02,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:02,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:02,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:02,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:02,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:02,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:02,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:02,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:47:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:47:02,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910235981] [2020-10-27 14:47:02,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:02,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:47:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468729848] [2020-10-27 14:47:02,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:47:02,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:02,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:47:02,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:47:02,439 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 7 states. [2020-10-27 14:47:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:02,675 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-27 14:47:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:47:02,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-27 14:47:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:02,677 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:47:02,677 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:47:02,678 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 [2020-10-27 14:47:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:47:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-27 14:47:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:47:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-27 14:47:02,698 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 40 [2020-10-27 14:47:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:02,699 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-27 14:47:02,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:47:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-27 14:47:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:47:02,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:02,704 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:02,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:47:02,706 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1545787959, now seen corresponding path program 4 times [2020-10-27 14:47:02,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:02,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717757823] [2020-10-27 14:47:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:05,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:05,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:05,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:07,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:47:07,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:47:07,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:47:07,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:07,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:47:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:47:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:47:07,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:07,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:07,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:07,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:07,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:07,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:47:07,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:07,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:07,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:07,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 14:47:07,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717757823] [2020-10-27 14:47:07,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:07,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:47:07,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812684238] [2020-10-27 14:47:07,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:47:07,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:47:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:47:07,861 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 8 states. [2020-10-27 14:47:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:08,021 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-27 14:47:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:47:08,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-27 14:47:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:08,022 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:47:08,022 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:47:08,023 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 [2020-10-27 14:47:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:47:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-27 14:47:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:47:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-10-27 14:47:08,032 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 48 [2020-10-27 14:47:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:08,032 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-10-27 14:47:08,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:47:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-10-27 14:47:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:47:08,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:08,034 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:08,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:47:08,034 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash -566161953, now seen corresponding path program 5 times [2020-10-27 14:47:08,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:08,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445842561] [2020-10-27 14:47:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:08,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:13,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:47:13,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:47:13,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:47:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:47:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:47:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:13,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:13,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:13,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:47:13,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:13,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 14:47:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445842561] [2020-10-27 14:47:13,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:13,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:47:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583884203] [2020-10-27 14:47:13,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:47:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:13,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:47:13,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:47:13,189 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 9 states. [2020-10-27 14:47:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:13,390 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2020-10-27 14:47:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:47:13,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-27 14:47:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:13,395 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:47:13,395 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 14:47:13,396 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 [2020-10-27 14:47:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 14:47:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-10-27 14:47:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:47:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-10-27 14:47:13,413 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 56 [2020-10-27 14:47:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:13,413 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-10-27 14:47:13,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:47:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-10-27 14:47:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:47:13,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:13,417 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:13,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:47:13,418 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -445369289, now seen corresponding path program 6 times [2020-10-27 14:47:13,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:13,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164839504] [2020-10-27 14:47:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:13,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:14,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:16,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:18,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:47:18,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:18,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:47:18,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:47:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:47:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:47:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:18,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:18,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:18,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:18,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:18,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:47:18,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:18,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:47:18,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164839504] [2020-10-27 14:47:18,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:18,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:47:18,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785225819] [2020-10-27 14:47:18,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:47:18,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:18,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:47:18,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:47:18,594 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 10 states. [2020-10-27 14:47:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:18,837 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-27 14:47:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:47:18,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-27 14:47:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:18,840 INFO L225 Difference]: With dead ends: 120 [2020-10-27 14:47:18,840 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:47:18,841 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 [2020-10-27 14:47:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:47:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-10-27 14:47:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:47:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-27 14:47:18,862 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 64 [2020-10-27 14:47:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:18,865 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-27 14:47:18,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:47:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-27 14:47:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:47:18,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:18,869 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:18,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:47:18,869 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash -212194849, now seen corresponding path program 7 times [2020-10-27 14:47:18,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:18,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996881638] [2020-10-27 14:47:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:19,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:19,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:19,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:19,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:23,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:47:23,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:47:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:47:23,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:47:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:47:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:47:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:24,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:24,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:24,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:24,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:47:24,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-27 14:47:24,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996881638] [2020-10-27 14:47:24,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:24,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:47:24,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860890758] [2020-10-27 14:47:24,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:47:24,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:47:24,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:47:24,068 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 11 states. [2020-10-27 14:47:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:24,322 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-27 14:47:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:47:24,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 14:47:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:24,326 INFO L225 Difference]: With dead ends: 132 [2020-10-27 14:47:24,326 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:47:24,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:47:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:47:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-10-27 14:47:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:47:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2020-10-27 14:47:24,340 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 72 [2020-10-27 14:47:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:24,341 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2020-10-27 14:47:24,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:47:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2020-10-27 14:47:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:47:24,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:24,345 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:24,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:47:24,346 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash -461353417, now seen corresponding path program 8 times [2020-10-27 14:47:24,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:24,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719105065] [2020-10-27 14:47:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:24,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:24,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:29,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:29,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 14:47:29,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:29,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:47:29,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:29,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:47:29,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:47:29,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:47:29,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:29,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:29,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:29,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:29,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:29,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:47:29,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-27 14:47:29,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719105065] [2020-10-27 14:47:29,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:29,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:47:29,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960775975] [2020-10-27 14:47:29,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:47:29,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:47:29,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:47:29,548 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand 12 states. [2020-10-27 14:47:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:29,834 INFO L93 Difference]: Finished difference Result 144 states and 179 transitions. [2020-10-27 14:47:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:47:29,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-10-27 14:47:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:29,836 INFO L225 Difference]: With dead ends: 144 [2020-10-27 14:47:29,836 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 14:47:29,837 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 [2020-10-27 14:47:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 14:47:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2020-10-27 14:47:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:47:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2020-10-27 14:47:29,848 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 80 [2020-10-27 14:47:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:29,848 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2020-10-27 14:47:29,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:47:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2020-10-27 14:47:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 14:47:29,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:29,850 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:29,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:47:29,850 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash -611023393, now seen corresponding path program 9 times [2020-10-27 14:47:29,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:29,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496324279] [2020-10-27 14:47:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:29,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:29,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:29,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:31,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:34,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:47:34,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:34,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:47:34,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:34,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:47:34,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 14:47:34,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:47:34,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:35,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:35,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:35,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:35,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:35,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:35,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-27 14:47:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496324279] [2020-10-27 14:47:35,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:35,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:47:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304020362] [2020-10-27 14:47:35,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:47:35,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:47:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:47:35,082 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand 13 states. [2020-10-27 14:47:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:35,444 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-10-27 14:47:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:47:35,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2020-10-27 14:47:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:35,446 INFO L225 Difference]: With dead ends: 156 [2020-10-27 14:47:35,446 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:47:35,447 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 [2020-10-27 14:47:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:47:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2020-10-27 14:47:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 14:47:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-27 14:47:35,454 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 88 [2020-10-27 14:47:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:35,454 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-27 14:47:35,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:47:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-27 14:47:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 14:47:35,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:35,456 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:35,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:47:35,456 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1112070089, now seen corresponding path program 10 times [2020-10-27 14:47:35,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:35,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767254854] [2020-10-27 14:47:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:37,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:38,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:38,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:38,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:40,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 14:47:40,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:47:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:47:40,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:47:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:47:40,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:47:40,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:40,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:40,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:40,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:40,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:40,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:40,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:47:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-27 14:47:40,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767254854] [2020-10-27 14:47:40,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:40,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:47:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951003415] [2020-10-27 14:47:40,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:47:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:47:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:47:40,719 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 14 states. [2020-10-27 14:47:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:41,065 INFO L93 Difference]: Finished difference Result 168 states and 209 transitions. [2020-10-27 14:47:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:47:41,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2020-10-27 14:47:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:41,066 INFO L225 Difference]: With dead ends: 168 [2020-10-27 14:47:41,067 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:47:41,067 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 [2020-10-27 14:47:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:47:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2020-10-27 14:47:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 14:47:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2020-10-27 14:47:41,079 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 96 [2020-10-27 14:47:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:41,079 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2020-10-27 14:47:41,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:47:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2020-10-27 14:47:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 14:47:41,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:41,081 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:41,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:47:41,082 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1954554335, now seen corresponding path program 11 times [2020-10-27 14:47:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:41,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381394755] [2020-10-27 14:47:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:41,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:46,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 14:47:46,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:46,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:47:46,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:46,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:47:46,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 14:47:46,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:47:46,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:46,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:46,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:46,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-10-27 14:47:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381394755] [2020-10-27 14:47:46,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:46,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:47:46,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054006517] [2020-10-27 14:47:46,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:47:46,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:47:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:47:46,333 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand 15 states. [2020-10-27 14:47:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:46,713 INFO L93 Difference]: Finished difference Result 180 states and 224 transitions. [2020-10-27 14:47:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:47:46,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-27 14:47:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:46,715 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:47:46,716 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 14:47:46,716 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 [2020-10-27 14:47:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 14:47:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-10-27 14:47:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:47:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2020-10-27 14:47:46,727 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 104 [2020-10-27 14:47:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:46,728 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2020-10-27 14:47:46,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:47:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2020-10-27 14:47:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 14:47:46,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:46,729 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:46,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:47:46,729 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1048001993, now seen corresponding path program 12 times [2020-10-27 14:47:46,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:46,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202130196] [2020-10-27 14:47:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:46,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:51,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:51,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 14:47:51,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:47:51,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:47:51,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:47:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:47:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:47:51,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:51,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:51,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-27 14:47:52,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202130196] [2020-10-27 14:47:52,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:52,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:47:52,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17893590] [2020-10-27 14:47:52,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:47:52,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:52,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:47:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:47:52,009 INFO L87 Difference]: Start difference. First operand 128 states and 166 transitions. Second operand 16 states. [2020-10-27 14:47:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:52,402 INFO L93 Difference]: Finished difference Result 192 states and 239 transitions. [2020-10-27 14:47:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:47:52,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-10-27 14:47:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:52,405 INFO L225 Difference]: With dead ends: 192 [2020-10-27 14:47:52,405 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 14:47:52,406 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 [2020-10-27 14:47:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 14:47:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2020-10-27 14:47:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 14:47:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2020-10-27 14:47:52,413 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 112 [2020-10-27 14:47:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:52,413 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2020-10-27 14:47:52,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:47:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2020-10-27 14:47:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 14:47:52,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:52,415 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:52,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:47:52,415 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:52,416 INFO L82 PathProgramCache]: Analyzing trace with hash 799866335, now seen corresponding path program 13 times [2020-10-27 14:47:52,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:52,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733747296] [2020-10-27 14:47:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:54,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:57,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:57,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 14:47:57,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:47:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:47:57,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:47:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 14:47:57,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:47:57,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:57,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:57,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:57,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:57,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:57,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:57,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-10-27 14:47:57,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733747296] [2020-10-27 14:47:57,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:57,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:47:57,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136770149] [2020-10-27 14:47:57,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:47:57,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:57,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:47:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:47:57,710 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand 17 states. [2020-10-27 14:47:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:58,111 INFO L93 Difference]: Finished difference Result 204 states and 254 transitions. [2020-10-27 14:47:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:47:58,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-10-27 14:47:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:58,114 INFO L225 Difference]: With dead ends: 204 [2020-10-27 14:47:58,114 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 14:47:58,115 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 [2020-10-27 14:47:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 14:47:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2020-10-27 14:47:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 14:47:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2020-10-27 14:47:58,123 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 120 [2020-10-27 14:47:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:58,123 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2020-10-27 14:47:58,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:47:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2020-10-27 14:47:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 14:47:58,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:58,125 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:58,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:47:58,125 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash 744823863, now seen corresponding path program 14 times [2020-10-27 14:47:58,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:58,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564735112] [2020-10-27 14:47:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:58,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:03,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 14:48:03,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:03,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:03,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:03,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:03,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:03,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:03,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:03,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:03,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:03,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:03,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:03,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-10-27 14:48:03,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564735112] [2020-10-27 14:48:03,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:03,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:48:03,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369634091] [2020-10-27 14:48:03,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:48:03,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:03,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:48:03,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:48:03,429 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand 18 states. [2020-10-27 14:48:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:03,874 INFO L93 Difference]: Finished difference Result 216 states and 269 transitions. [2020-10-27 14:48:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:48:03,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 128 [2020-10-27 14:48:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:03,876 INFO L225 Difference]: With dead ends: 216 [2020-10-27 14:48:03,876 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:48:03,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:48:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:48:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2020-10-27 14:48:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 14:48:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2020-10-27 14:48:03,891 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 128 [2020-10-27 14:48:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:03,892 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2020-10-27 14:48:03,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:48:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2020-10-27 14:48:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 14:48:03,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:03,894 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:03,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:48:03,894 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash 313203167, now seen corresponding path program 15 times [2020-10-27 14:48:03,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:03,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674331032] [2020-10-27 14:48:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:03,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:03,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:06,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:06,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:08,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:08,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 14:48:08,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 14:48:08,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:48:08,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:08,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:48:08,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 14:48:08,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:48:08,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:09,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:09,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:09,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:09,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:09,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:09,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:48:09,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:09,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:09,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:09,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:09,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-10-27 14:48:09,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674331032] [2020-10-27 14:48:09,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:09,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:48:09,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426068652] [2020-10-27 14:48:09,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:48:09,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:09,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:48:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:48:09,263 INFO L87 Difference]: Start difference. First operand 155 states and 202 transitions. Second operand 19 states. [2020-10-27 14:48:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:09,789 INFO L93 Difference]: Finished difference Result 228 states and 284 transitions. [2020-10-27 14:48:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:48:09,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-10-27 14:48:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:09,791 INFO L225 Difference]: With dead ends: 228 [2020-10-27 14:48:09,791 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 14:48:09,792 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 [2020-10-27 14:48:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 14:48:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2020-10-27 14:48:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:48:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 214 transitions. [2020-10-27 14:48:09,799 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 214 transitions. Word has length 136 [2020-10-27 14:48:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:09,799 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 214 transitions. [2020-10-27 14:48:09,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:48:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 214 transitions. [2020-10-27 14:48:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 14:48:09,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:09,801 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:09,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:48:09,802 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash 649868855, now seen corresponding path program 16 times [2020-10-27 14:48:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:09,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376995084] [2020-10-27 14:48:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:09,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:09,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:09,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:10,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:10,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:10,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:12,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:14,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:14,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:14,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 14:48:14,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:48:14,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:48:14,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:14,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:48:14,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 14:48:14,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:48:14,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:15,383 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-10-27 14:48:15,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:15,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-27 14:48:15,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376995084] [2020-10-27 14:48:15,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:15,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:48:15,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471185226] [2020-10-27 14:48:15,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:48:15,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:48:15,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:48:15,475 INFO L87 Difference]: Start difference. First operand 164 states and 214 transitions. Second operand 9 states. [2020-10-27 14:48:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:15,894 INFO L93 Difference]: Finished difference Result 381 states and 510 transitions. [2020-10-27 14:48:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:48:15,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 144 [2020-10-27 14:48:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:15,896 INFO L225 Difference]: With dead ends: 381 [2020-10-27 14:48:15,896 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:48:15,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:48:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:48:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-10-27 14:48:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 14:48:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 246 transitions. [2020-10-27 14:48:15,907 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 246 transitions. Word has length 144 [2020-10-27 14:48:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:15,907 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 246 transitions. [2020-10-27 14:48:15,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:48:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 246 transitions. [2020-10-27 14:48:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 14:48:15,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:15,909 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:15,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:48:15,909 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash -320689097, now seen corresponding path program 1 times [2020-10-27 14:48:15,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:15,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664050320] [2020-10-27 14:48:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:16,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:21,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:21,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:21,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:21,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:21,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:21,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:21,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:21,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:21,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:21,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-10-27 14:48:21,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664050320] [2020-10-27 14:48:21,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:21,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:48:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137017170] [2020-10-27 14:48:21,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:48:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:48:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:48:21,268 INFO L87 Difference]: Start difference. First operand 196 states and 246 transitions. Second operand 20 states. [2020-10-27 14:48:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:21,813 INFO L93 Difference]: Finished difference Result 276 states and 335 transitions. [2020-10-27 14:48:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:48:21,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 144 [2020-10-27 14:48:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:21,816 INFO L225 Difference]: With dead ends: 276 [2020-10-27 14:48:21,816 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 14:48:21,817 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 [2020-10-27 14:48:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 14:48:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-10-27 14:48:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 14:48:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2020-10-27 14:48:21,827 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 144 [2020-10-27 14:48:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:21,828 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2020-10-27 14:48:21,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:48:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2020-10-27 14:48:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 14:48:21,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:21,830 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:21,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:48:21,830 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:21,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:21,831 INFO L82 PathProgramCache]: Analyzing trace with hash 500816865, now seen corresponding path program 2 times [2020-10-27 14:48:21,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:21,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528316] [2020-10-27 14:48:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:21,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:22,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:25,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:25,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 14:48:25,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:25,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3981 [2020-10-27 14:48:25,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:25,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:48:25,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 14:48:25,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:48:25,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:26,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:26,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:26,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:26,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:26,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:26,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:26,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:26,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:26,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:26,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:26,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2020-10-27 14:48:26,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528316] [2020-10-27 14:48:26,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:26,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:48:26,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380238499] [2020-10-27 14:48:26,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:48:26,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:26,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:48:26,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:48:26,200 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand 21 states. [2020-10-27 14:48:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:26,787 INFO L93 Difference]: Finished difference Result 290 states and 352 transitions. [2020-10-27 14:48:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:48:26,788 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2020-10-27 14:48:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:26,790 INFO L225 Difference]: With dead ends: 290 [2020-10-27 14:48:26,790 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 14:48:26,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:48:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 14:48:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 218. [2020-10-27 14:48:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-27 14:48:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 274 transitions. [2020-10-27 14:48:26,802 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 274 transitions. Word has length 152 [2020-10-27 14:48:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:26,802 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 274 transitions. [2020-10-27 14:48:26,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:48:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 274 transitions. [2020-10-27 14:48:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 14:48:26,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:26,804 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:26,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:48:26,805 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:26,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1838396169, now seen corresponding path program 3 times [2020-10-27 14:48:26,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:26,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30616609] [2020-10-27 14:48:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:26,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:27,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:31,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:31,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 14:48:31,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:31,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4612 [2020-10-27 14:48:31,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:31,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:48:31,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 14:48:31,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 14:48:31,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:31,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:31,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:31,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:31,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-10-27 14:48:31,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30616609] [2020-10-27 14:48:31,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:31,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:48:31,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696271993] [2020-10-27 14:48:31,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:48:31,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:31,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:48:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:48:31,822 INFO L87 Difference]: Start difference. First operand 218 states and 274 transitions. Second operand 22 states. [2020-10-27 14:48:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:32,405 INFO L93 Difference]: Finished difference Result 304 states and 369 transitions. [2020-10-27 14:48:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:48:32,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 160 [2020-10-27 14:48:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:32,407 INFO L225 Difference]: With dead ends: 304 [2020-10-27 14:48:32,407 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 14:48:32,408 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 [2020-10-27 14:48:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 14:48:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2020-10-27 14:48:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 14:48:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 288 transitions. [2020-10-27 14:48:32,423 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 288 transitions. Word has length 160 [2020-10-27 14:48:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:32,423 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 288 transitions. [2020-10-27 14:48:32,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:48:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 288 transitions. [2020-10-27 14:48:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 14:48:32,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:32,426 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:32,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:48:32,426 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash -847776479, now seen corresponding path program 4 times [2020-10-27 14:48:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:32,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918914241] [2020-10-27 14:48:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:32,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:37,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:37,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 14:48:37,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:37,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:48:37,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:48:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-27 14:48:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:48:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:37,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:37,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:37,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:37,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:37,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:37,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:48:37,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:37,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-10-27 14:48:37,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918914241] [2020-10-27 14:48:37,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:37,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:48:37,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474023483] [2020-10-27 14:48:37,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:48:37,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:37,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:48:37,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:48:37,853 INFO L87 Difference]: Start difference. First operand 229 states and 288 transitions. Second operand 23 states. [2020-10-27 14:48:38,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:38,402 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2020-10-27 14:48:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:48:38,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 168 [2020-10-27 14:48:38,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:38,405 INFO L225 Difference]: With dead ends: 318 [2020-10-27 14:48:38,405 INFO L226 Difference]: Without dead ends: 248 [2020-10-27 14:48:38,407 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 [2020-10-27 14:48:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-27 14:48:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-27 14:48:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 14:48:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 302 transitions. [2020-10-27 14:48:38,418 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 302 transitions. Word has length 168 [2020-10-27 14:48:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:38,419 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 302 transitions. [2020-10-27 14:48:38,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:48:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 302 transitions. [2020-10-27 14:48:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 14:48:38,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:38,421 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:38,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:48:38,421 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash -877978185, now seen corresponding path program 5 times [2020-10-27 14:48:38,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:38,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555766824] [2020-10-27 14:48:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:48:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:43,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:43,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2020-10-27 14:48:43,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555766824] [2020-10-27 14:48:43,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:43,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:48:43,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716961035] [2020-10-27 14:48:43,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:48:43,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:48:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:48:43,890 INFO L87 Difference]: Start difference. First operand 240 states and 302 transitions. Second operand 24 states. [2020-10-27 14:48:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:44,475 INFO L93 Difference]: Finished difference Result 332 states and 403 transitions. [2020-10-27 14:48:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:48:44,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 176 [2020-10-27 14:48:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:44,479 INFO L225 Difference]: With dead ends: 332 [2020-10-27 14:48:44,479 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 14:48:44,485 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 [2020-10-27 14:48:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 14:48:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 251. [2020-10-27 14:48:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 14:48:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 316 transitions. [2020-10-27 14:48:44,497 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 316 transitions. Word has length 176 [2020-10-27 14:48:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:44,497 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 316 transitions. [2020-10-27 14:48:44,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:48:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 316 transitions. [2020-10-27 14:48:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-27 14:48:44,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:44,499 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:44,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:48:44,500 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash 602857057, now seen corresponding path program 6 times [2020-10-27 14:48:44,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:44,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734197641] [2020-10-27 14:48:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:44,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:44,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:49,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:49,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 14:48:49,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:48:49,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:48:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-27 14:48:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:48:49,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:49,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:49,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:49,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:49,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:49,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:49,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:48:49,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:49,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:49,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:49,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:49,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-27 14:48:50,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734197641] [2020-10-27 14:48:50,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:50,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:48:50,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806530261] [2020-10-27 14:48:50,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:48:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:50,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:48:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:48:50,003 INFO L87 Difference]: Start difference. First operand 251 states and 316 transitions. Second operand 25 states. [2020-10-27 14:48:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:50,628 INFO L93 Difference]: Finished difference Result 346 states and 420 transitions. [2020-10-27 14:48:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:48:50,629 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 184 [2020-10-27 14:48:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:50,631 INFO L225 Difference]: With dead ends: 346 [2020-10-27 14:48:50,631 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 14:48:50,631 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 [2020-10-27 14:48:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 14:48:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2020-10-27 14:48:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 14:48:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 330 transitions. [2020-10-27 14:48:50,642 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 330 transitions. Word has length 184 [2020-10-27 14:48:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:50,643 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 330 transitions. [2020-10-27 14:48:50,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:48:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 330 transitions. [2020-10-27 14:48:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-27 14:48:50,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:50,645 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:50,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:48:50,645 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1316691575, now seen corresponding path program 7 times [2020-10-27 14:48:50,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:50,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802568052] [2020-10-27 14:48:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:50,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:51,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:55,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:55,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-27 14:48:55,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:48:55,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:48:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-27 14:48:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:48:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:56,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:56,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:56,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:56,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:56,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:56,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:56,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:56,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:56,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:56,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-10-27 14:48:56,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802568052] [2020-10-27 14:48:56,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:56,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:48:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926432489] [2020-10-27 14:48:56,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:48:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:48:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:48:56,289 INFO L87 Difference]: Start difference. First operand 262 states and 330 transitions. Second operand 26 states. [2020-10-27 14:48:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:56,905 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2020-10-27 14:48:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:48:56,906 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 192 [2020-10-27 14:48:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:56,908 INFO L225 Difference]: With dead ends: 360 [2020-10-27 14:48:56,908 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 14:48:56,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:48:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 14:48:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 273. [2020-10-27 14:48:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 14:48:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 344 transitions. [2020-10-27 14:48:56,919 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 344 transitions. Word has length 192 [2020-10-27 14:48:56,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:56,920 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 344 transitions. [2020-10-27 14:48:56,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:48:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 344 transitions. [2020-10-27 14:48:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-27 14:48:56,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:56,921 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:56,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:48:56,922 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:56,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:56,922 INFO L82 PathProgramCache]: Analyzing trace with hash 367171489, now seen corresponding path program 8 times [2020-10-27 14:48:56,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:56,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356556144] [2020-10-27 14:48:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:56,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:01,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:01,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-27 14:49:01,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:01,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:49:01,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:01,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:49:01,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-27 14:49:01,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:49:01,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:02,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:02,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:02,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:02,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:02,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:02,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:02,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2020-10-27 14:49:02,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356556144] [2020-10-27 14:49:02,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:02,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:49:02,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941469017] [2020-10-27 14:49:02,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:49:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:49:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:49:02,500 INFO L87 Difference]: Start difference. First operand 273 states and 344 transitions. Second operand 27 states. [2020-10-27 14:49:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:03,188 INFO L93 Difference]: Finished difference Result 374 states and 454 transitions. [2020-10-27 14:49:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:49:03,189 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 200 [2020-10-27 14:49:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:03,192 INFO L225 Difference]: With dead ends: 374 [2020-10-27 14:49:03,192 INFO L226 Difference]: Without dead ends: 292 [2020-10-27 14:49:03,193 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 [2020-10-27 14:49:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-27 14:49:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2020-10-27 14:49:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 14:49:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2020-10-27 14:49:03,211 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 200 [2020-10-27 14:49:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:03,211 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2020-10-27 14:49:03,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:49:03,211 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2020-10-27 14:49:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 14:49:03,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:03,213 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:03,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:49:03,213 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:03,214 INFO L82 PathProgramCache]: Analyzing trace with hash -71807177, now seen corresponding path program 9 times [2020-10-27 14:49:03,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:03,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738338868] [2020-10-27 14:49:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:03,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:03,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:08,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 14:49:08,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:08,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:08,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:08,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:08,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:08,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:08,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:08,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:08,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:08,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:08,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:08,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-27 14:49:08,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738338868] [2020-10-27 14:49:08,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:08,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:49:08,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16025919] [2020-10-27 14:49:08,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:49:08,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:08,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:49:08,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:49:08,860 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand 28 states. [2020-10-27 14:49:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:09,564 INFO L93 Difference]: Finished difference Result 388 states and 471 transitions. [2020-10-27 14:49:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:49:09,564 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 208 [2020-10-27 14:49:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:09,566 INFO L225 Difference]: With dead ends: 388 [2020-10-27 14:49:09,566 INFO L226 Difference]: Without dead ends: 303 [2020-10-27 14:49:09,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:49:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-27 14:49:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 295. [2020-10-27 14:49:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-27 14:49:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 372 transitions. [2020-10-27 14:49:09,579 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 372 transitions. Word has length 208 [2020-10-27 14:49:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:09,579 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 372 transitions. [2020-10-27 14:49:09,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:49:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 372 transitions. [2020-10-27 14:49:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 14:49:09,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:09,581 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:09,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:49:09,581 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1929961247, now seen corresponding path program 10 times [2020-10-27 14:49:09,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:09,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741213556] [2020-10-27 14:49:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:09,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:14,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:14,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 14:49:14,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:14,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:49:14,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:14,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:49:14,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-27 14:49:14,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 14:49:14,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:15,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:15,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:15,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:15,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:15,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:15,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:15,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2020-10-27 14:49:15,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741213556] [2020-10-27 14:49:15,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:15,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:49:15,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006475250] [2020-10-27 14:49:15,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:49:15,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:49:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:49:15,269 INFO L87 Difference]: Start difference. First operand 295 states and 372 transitions. Second operand 29 states. [2020-10-27 14:49:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:15,977 INFO L93 Difference]: Finished difference Result 402 states and 488 transitions. [2020-10-27 14:49:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:49:15,978 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 216 [2020-10-27 14:49:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:15,980 INFO L225 Difference]: With dead ends: 402 [2020-10-27 14:49:15,980 INFO L226 Difference]: Without dead ends: 314 [2020-10-27 14:49:15,981 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 [2020-10-27 14:49:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-27 14:49:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 306. [2020-10-27 14:49:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-27 14:49:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 386 transitions. [2020-10-27 14:49:15,994 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 386 transitions. Word has length 216 [2020-10-27 14:49:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:15,995 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 386 transitions. [2020-10-27 14:49:15,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:49:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 386 transitions. [2020-10-27 14:49:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 14:49:15,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:15,997 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:15,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:49:15,997 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:15,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1623281673, now seen corresponding path program 11 times [2020-10-27 14:49:15,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:15,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981937632] [2020-10-27 14:49:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:16,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 143 [2020-10-27 14:49:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 14:49:21,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:21,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:21,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:21,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:21,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:21,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:49:21,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:21,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:21,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:21,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:21,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2020-10-27 14:49:21,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981937632] [2020-10-27 14:49:21,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:21,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:49:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443802022] [2020-10-27 14:49:21,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:49:21,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:21,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:49:21,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:49:21,714 INFO L87 Difference]: Start difference. First operand 306 states and 386 transitions. Second operand 30 states. [2020-10-27 14:49:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:22,440 INFO L93 Difference]: Finished difference Result 416 states and 505 transitions. [2020-10-27 14:49:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:49:22,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 224 [2020-10-27 14:49:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:22,443 INFO L225 Difference]: With dead ends: 416 [2020-10-27 14:49:22,443 INFO L226 Difference]: Without dead ends: 325 [2020-10-27 14:49:22,444 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 [2020-10-27 14:49:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-27 14:49:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2020-10-27 14:49:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-27 14:49:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 400 transitions. [2020-10-27 14:49:22,464 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 400 transitions. Word has length 224 [2020-10-27 14:49:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:22,464 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 400 transitions. [2020-10-27 14:49:22,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:49:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 400 transitions. [2020-10-27 14:49:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-27 14:49:22,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:22,466 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:22,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:49:22,466 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:22,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1479509471, now seen corresponding path program 12 times [2020-10-27 14:49:22,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:22,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838345272] [2020-10-27 14:49:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:22,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:27,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:27,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-27 14:49:27,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:27,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:49:27,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:49:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 14:49:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 14:49:27,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:28,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:28,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:28,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:28,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:28,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:28,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:28,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-10-27 14:49:28,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838345272] [2020-10-27 14:49:28,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:28,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:49:28,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594797122] [2020-10-27 14:49:28,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:49:28,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:28,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:49:28,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:49:28,211 INFO L87 Difference]: Start difference. First operand 317 states and 400 transitions. Second operand 31 states. [2020-10-27 14:49:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:29,006 INFO L93 Difference]: Finished difference Result 430 states and 522 transitions. [2020-10-27 14:49:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:49:29,007 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 232 [2020-10-27 14:49:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:29,009 INFO L225 Difference]: With dead ends: 430 [2020-10-27 14:49:29,009 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:49:29,010 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 [2020-10-27 14:49:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:49:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-10-27 14:49:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 14:49:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 414 transitions. [2020-10-27 14:49:29,022 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 414 transitions. Word has length 232 [2020-10-27 14:49:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:29,023 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 414 transitions. [2020-10-27 14:49:29,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:49:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 414 transitions. [2020-10-27 14:49:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 14:49:29,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:29,025 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:29,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:49:29,025 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1343602505, now seen corresponding path program 13 times [2020-10-27 14:49:29,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:29,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098344190] [2020-10-27 14:49:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:29,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:29,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:34,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:34,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-27 14:49:34,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:34,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:49:34,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:49:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 14:49:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 14:49:34,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:34,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:34,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:34,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:34,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:34,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:34,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:34,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2020-10-27 14:49:34,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098344190] [2020-10-27 14:49:34,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:34,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:49:34,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004715120] [2020-10-27 14:49:34,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:49:34,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:49:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:49:34,793 INFO L87 Difference]: Start difference. First operand 328 states and 414 transitions. Second operand 32 states. [2020-10-27 14:49:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:35,691 INFO L93 Difference]: Finished difference Result 444 states and 539 transitions. [2020-10-27 14:49:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:49:35,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 240 [2020-10-27 14:49:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:35,696 INFO L225 Difference]: With dead ends: 444 [2020-10-27 14:49:35,696 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 14:49:35,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:49:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 14:49:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2020-10-27 14:49:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 14:49:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 428 transitions. [2020-10-27 14:49:35,708 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 428 transitions. Word has length 240 [2020-10-27 14:49:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:35,709 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 428 transitions. [2020-10-27 14:49:35,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:49:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 428 transitions. [2020-10-27 14:49:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-27 14:49:35,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:35,710 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:35,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:49:35,711 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:35,711 INFO L82 PathProgramCache]: Analyzing trace with hash -99441823, now seen corresponding path program 14 times [2020-10-27 14:49:35,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:35,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499888936] [2020-10-27 14:49:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:36,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:40,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:40,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-27 14:49:40,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:40,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:49:40,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:49:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-27 14:49:40,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 14:49:40,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:41,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:41,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:41,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:41,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:41,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:41,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:41,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:41,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:41,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:41,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:41,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2020-10-27 14:49:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499888936] [2020-10-27 14:49:41,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:41,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:49:41,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767270941] [2020-10-27 14:49:41,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:49:41,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:41,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:49:41,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:49:41,567 INFO L87 Difference]: Start difference. First operand 339 states and 428 transitions. Second operand 33 states. [2020-10-27 14:49:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:42,356 INFO L93 Difference]: Finished difference Result 458 states and 556 transitions. [2020-10-27 14:49:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:49:42,356 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 248 [2020-10-27 14:49:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:42,358 INFO L225 Difference]: With dead ends: 458 [2020-10-27 14:49:42,358 INFO L226 Difference]: Without dead ends: 358 [2020-10-27 14:49:42,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:49:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-27 14:49:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2020-10-27 14:49:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-27 14:49:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 442 transitions. [2020-10-27 14:49:42,370 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 442 transitions. Word has length 248 [2020-10-27 14:49:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:42,371 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 442 transitions. [2020-10-27 14:49:42,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:49:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 442 transitions. [2020-10-27 14:49:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-27 14:49:42,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:42,373 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:42,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:49:42,373 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash 261554551, now seen corresponding path program 15 times [2020-10-27 14:49:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723925817] [2020-10-27 14:49:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:42,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:43,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 14:49:47,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:48,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:48,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:48,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:48,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:48,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:48,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:48,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:48,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-27 14:49:48,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723925817] [2020-10-27 14:49:48,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:48,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:49:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474933619] [2020-10-27 14:49:48,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:49:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:49:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:49:48,248 INFO L87 Difference]: Start difference. First operand 350 states and 442 transitions. Second operand 34 states. [2020-10-27 14:49:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:49,073 INFO L93 Difference]: Finished difference Result 472 states and 573 transitions. [2020-10-27 14:49:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:49:49,073 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 256 [2020-10-27 14:49:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:49,076 INFO L225 Difference]: With dead ends: 472 [2020-10-27 14:49:49,077 INFO L226 Difference]: Without dead ends: 369 [2020-10-27 14:49:49,078 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 [2020-10-27 14:49:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-27 14:49:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 361. [2020-10-27 14:49:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-27 14:49:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 456 transitions. [2020-10-27 14:49:49,088 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 456 transitions. Word has length 256 [2020-10-27 14:49:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:49,089 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 456 transitions. [2020-10-27 14:49:49,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:49:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 456 transitions. [2020-10-27 14:49:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-27 14:49:49,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:49,091 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:49,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:49:49,091 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash -866018143, now seen corresponding path program 16 times [2020-10-27 14:49:49,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:49,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425846879] [2020-10-27 14:49:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:49,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:54,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 14:49:54,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2020-10-27 14:49:55,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425846879] [2020-10-27 14:49:55,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:55,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:49:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718510599] [2020-10-27 14:49:55,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:49:55,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:49:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:49:55,016 INFO L87 Difference]: Start difference. First operand 361 states and 456 transitions. Second operand 35 states. [2020-10-27 14:49:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:55,994 INFO L93 Difference]: Finished difference Result 486 states and 590 transitions. [2020-10-27 14:49:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:49:55,995 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 264 [2020-10-27 14:49:55,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:55,997 INFO L225 Difference]: With dead ends: 486 [2020-10-27 14:49:55,997 INFO L226 Difference]: Without dead ends: 380 [2020-10-27 14:49:55,999 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 [2020-10-27 14:49:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-27 14:49:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 372. [2020-10-27 14:49:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-27 14:49:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 470 transitions. [2020-10-27 14:49:56,009 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 470 transitions. Word has length 264 [2020-10-27 14:49:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:56,010 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 470 transitions. [2020-10-27 14:49:56,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:49:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 470 transitions. [2020-10-27 14:49:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 14:49:56,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:56,012 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:56,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:49:56,012 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:56,013 INFO L82 PathProgramCache]: Analyzing trace with hash -887033289, now seen corresponding path program 17 times [2020-10-27 14:49:56,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:56,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979494259] [2020-10-27 14:49:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:01,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 14:50:01,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:01,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:50:01,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:01,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:50:01,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-10-27 14:50:01,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 14:50:01,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:01,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2020-10-27 14:50:01,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979494259] [2020-10-27 14:50:01,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:01,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:50:01,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774282049] [2020-10-27 14:50:01,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:50:01,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:50:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:50:01,988 INFO L87 Difference]: Start difference. First operand 372 states and 470 transitions. Second operand 36 states. [2020-10-27 14:50:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:02,965 INFO L93 Difference]: Finished difference Result 500 states and 607 transitions. [2020-10-27 14:50:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:50:02,965 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 272 [2020-10-27 14:50:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:02,967 INFO L225 Difference]: With dead ends: 500 [2020-10-27 14:50:02,968 INFO L226 Difference]: Without dead ends: 391 [2020-10-27 14:50:02,969 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 [2020-10-27 14:50:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-27 14:50:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 383. [2020-10-27 14:50:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-27 14:50:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 484 transitions. [2020-10-27 14:50:02,980 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 484 transitions. Word has length 272 [2020-10-27 14:50:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:02,981 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 484 transitions. [2020-10-27 14:50:02,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:50:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 484 transitions. [2020-10-27 14:50:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-27 14:50:02,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:02,987 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:02,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:50:02,987 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:02,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1549886945, now seen corresponding path program 18 times [2020-10-27 14:50:02,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:02,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125562454] [2020-10-27 14:50:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:03,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:08,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:08,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-27 14:50:08,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:08,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:50:08,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:50:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-27 14:50:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 14:50:08,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:08,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:08,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:08,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:08,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:08,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:08,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2673 trivial. 0 not checked. [2020-10-27 14:50:09,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125562454] [2020-10-27 14:50:09,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:09,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:50:09,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682844512] [2020-10-27 14:50:09,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:50:09,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:09,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:50:09,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:50:09,045 INFO L87 Difference]: Start difference. First operand 383 states and 484 transitions. Second operand 37 states. [2020-10-27 14:50:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:10,118 INFO L93 Difference]: Finished difference Result 514 states and 624 transitions. [2020-10-27 14:50:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:50:10,119 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 280 [2020-10-27 14:50:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:10,122 INFO L225 Difference]: With dead ends: 514 [2020-10-27 14:50:10,122 INFO L226 Difference]: Without dead ends: 402 [2020-10-27 14:50:10,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:50:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-27 14:50:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 394. [2020-10-27 14:50:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-27 14:50:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 498 transitions. [2020-10-27 14:50:10,134 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 498 transitions. Word has length 280 [2020-10-27 14:50:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:10,134 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 498 transitions. [2020-10-27 14:50:10,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:50:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 498 transitions. [2020-10-27 14:50:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-27 14:50:10,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:10,137 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:10,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:50:10,137 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash -630975753, now seen corresponding path program 19 times [2020-10-27 14:50:10,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:10,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588602575] [2020-10-27 14:50:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:10,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:11,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:15,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:15,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-27 14:50:15,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:15,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:50:15,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:50:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-10-27 14:50:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 14:50:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:16,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:16,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:16,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:16,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:16,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:16,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:16,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:16,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:16,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:16,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:16,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2839 trivial. 0 not checked. [2020-10-27 14:50:16,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588602575] [2020-10-27 14:50:16,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:16,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:50:16,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362315967] [2020-10-27 14:50:16,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:50:16,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:50:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:50:16,298 INFO L87 Difference]: Start difference. First operand 394 states and 498 transitions. Second operand 38 states. [2020-10-27 14:50:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:17,426 INFO L93 Difference]: Finished difference Result 528 states and 641 transitions. [2020-10-27 14:50:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:50:17,426 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 288 [2020-10-27 14:50:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:17,429 INFO L225 Difference]: With dead ends: 528 [2020-10-27 14:50:17,430 INFO L226 Difference]: Without dead ends: 413 [2020-10-27 14:50:17,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:50:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-27 14:50:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 405. [2020-10-27 14:50:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-27 14:50:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 512 transitions. [2020-10-27 14:50:17,444 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 512 transitions. Word has length 288 [2020-10-27 14:50:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:17,444 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 512 transitions. [2020-10-27 14:50:17,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:50:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 512 transitions. [2020-10-27 14:50:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-27 14:50:17,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:17,447 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:17,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:50:17,447 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash 481689377, now seen corresponding path program 20 times [2020-10-27 14:50:17,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:17,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129658924] [2020-10-27 14:50:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:18,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:22,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-27 14:50:22,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:22,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:50:22,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:50:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-27 14:50:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 14:50:22,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:23,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:23,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:23,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:23,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:23,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:23,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:23,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:23,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3010 trivial. 0 not checked. [2020-10-27 14:50:23,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129658924] [2020-10-27 14:50:23,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:23,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:50:23,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293907272] [2020-10-27 14:50:23,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:50:23,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:50:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:50:23,654 INFO L87 Difference]: Start difference. First operand 405 states and 512 transitions. Second operand 39 states. [2020-10-27 14:50:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:24,805 INFO L93 Difference]: Finished difference Result 542 states and 658 transitions. [2020-10-27 14:50:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:50:24,806 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 296 [2020-10-27 14:50:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:24,808 INFO L225 Difference]: With dead ends: 542 [2020-10-27 14:50:24,808 INFO L226 Difference]: Without dead ends: 424 [2020-10-27 14:50:24,809 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 [2020-10-27 14:50:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-27 14:50:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 416. [2020-10-27 14:50:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-27 14:50:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 526 transitions. [2020-10-27 14:50:24,821 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 526 transitions. Word has length 296 [2020-10-27 14:50:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:24,822 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 526 transitions. [2020-10-27 14:50:24,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:50:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 526 transitions. [2020-10-27 14:50:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-27 14:50:24,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:24,824 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:24,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:50:24,825 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:24,825 INFO L82 PathProgramCache]: Analyzing trace with hash -532913225, now seen corresponding path program 21 times [2020-10-27 14:50:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:24,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131195009] [2020-10-27 14:50:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:24,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 14:50:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:31,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:31,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:31,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2020-10-27 14:50:31,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131195009] [2020-10-27 14:50:31,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:31,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:50:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987910827] [2020-10-27 14:50:31,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:50:31,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:50:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:50:31,110 INFO L87 Difference]: Start difference. First operand 416 states and 526 transitions. Second operand 40 states. [2020-10-27 14:50:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:32,303 INFO L93 Difference]: Finished difference Result 556 states and 675 transitions. [2020-10-27 14:50:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:50:32,304 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 304 [2020-10-27 14:50:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:32,306 INFO L225 Difference]: With dead ends: 556 [2020-10-27 14:50:32,306 INFO L226 Difference]: Without dead ends: 435 [2020-10-27 14:50:32,307 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 [2020-10-27 14:50:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-27 14:50:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 427. [2020-10-27 14:50:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-27 14:50:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 540 transitions. [2020-10-27 14:50:32,319 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 540 transitions. Word has length 304 [2020-10-27 14:50:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:32,319 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 540 transitions. [2020-10-27 14:50:32,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:50:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 540 transitions. [2020-10-27 14:50:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 14:50:32,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:32,321 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:32,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:50:32,322 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash -184326047, now seen corresponding path program 22 times [2020-10-27 14:50:32,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:32,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542548729] [2020-10-27 14:50:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:32,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:33,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:37,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:37,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-27 14:50:37,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:37,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:50:37,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:50:37,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-10-27 14:50:37,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 14:50:37,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:38,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:38,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:38,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3367 trivial. 0 not checked. [2020-10-27 14:50:38,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542548729] [2020-10-27 14:50:38,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:38,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:50:38,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771638653] [2020-10-27 14:50:38,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:50:38,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:38,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:50:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:50:38,649 INFO L87 Difference]: Start difference. First operand 427 states and 540 transitions. Second operand 41 states.