/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:33:19,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:33:19,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:33:19,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:33:19,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:33:19,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:33:19,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:33:19,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:33:19,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:33:19,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:33:19,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:33:19,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:33:19,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:33:19,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:33:19,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:33:19,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:33:19,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:33:19,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:33:19,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:33:19,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:33:19,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:33:19,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:33:19,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:33:19,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:33:19,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:33:19,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:33:19,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:33:19,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:33:19,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:33:19,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:33:19,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:33:19,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:33:19,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:33:19,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:33:19,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:33:19,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:33:19,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:33:19,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:33:19,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:33:19,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:33:19,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:33:19,386 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 01:33:19,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:33:19,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:33:19,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:33:19,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:33:19,444 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:33:19,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:33:19,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:33:19,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:33:19,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:33:19,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:33:19,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:33:19,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:33:19,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:33:19,447 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:33:19,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:33:19,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:33:19,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:33:19,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:33:19,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:33:19,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:33:19,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:33:19,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:33:19,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:33:19,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:33:19,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:33:19,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:33:19,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:33:19,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:33:19,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:33:19,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:33:19,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:33:19,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:33:19,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:33:19,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:33:19,899 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:33:19,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-27 01:33:19,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04ae40b83/92c4fe32460c4bd1b6f701a8317e2e13/FLAGdfa1e21dd [2020-10-27 01:33:20,582 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:33:20,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-27 01:33:20,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04ae40b83/92c4fe32460c4bd1b6f701a8317e2e13/FLAGdfa1e21dd [2020-10-27 01:33:20,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04ae40b83/92c4fe32460c4bd1b6f701a8317e2e13 [2020-10-27 01:33:20,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:33:20,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:33:20,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:33:20,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:33:20,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:33:20,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:33:20" (1/1) ... [2020-10-27 01:33:20,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d2bd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:20, skipping insertion in model container [2020-10-27 01:33:20,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:33:20" (1/1) ... [2020-10-27 01:33:20,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:33:21,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:33:21,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:33:21,188 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:33:21,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:33:21,221 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:33:21,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21 WrapperNode [2020-10-27 01:33:21,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:33:21,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:33:21,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:33:21,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:33:21,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (1/1) ... [2020-10-27 01:33:21,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (1/1) ... [2020-10-27 01:33:21,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (1/1) ... [2020-10-27 01:33:21,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (1/1) ... [2020-10-27 01:33:21,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (1/1) ... [2020-10-27 01:33:21,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (1/1) ... [2020-10-27 01:33:21,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (1/1) ... [2020-10-27 01:33:21,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:33:21,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:33:21,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:33:21,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:33:21,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (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 01:33:21,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:33:21,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:33:21,356 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:33:21,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:33:21,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:33:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:33:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:33:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:33:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:33:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:33:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:33:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:33:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:33:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:33:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:33:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:33:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:33:21,647 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:33:21,647 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:33:21,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:33:21 BoogieIcfgContainer [2020-10-27 01:33:21,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:33:21,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:33:21,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:33:21,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:33:21,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:33:20" (1/3) ... [2020-10-27 01:33:21,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4e3beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:33:21, skipping insertion in model container [2020-10-27 01:33:21,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:21" (2/3) ... [2020-10-27 01:33:21,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4e3beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:33:21, skipping insertion in model container [2020-10-27 01:33:21,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:33:21" (3/3) ... [2020-10-27 01:33:21,658 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-1.c [2020-10-27 01:33:21,671 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:33:21,676 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:33:21,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:33:21,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:33:21,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:33:21,715 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:33:21,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:33:21,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:33:21,715 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:33:21,716 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:33:21,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:33:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:33:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:33:21,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:21,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:21,740 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 01:33:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:21,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009022798] [2020-10-27 01:33:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:22,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:33:22,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:22,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 01:33:22,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:22,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:22,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:22,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:22,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:33:22,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:22,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:22,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:22,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:22,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 01:33:22,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:33:22,271 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 01:33:22,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009022798] [2020-10-27 01:33:22,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:33:22,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:33:22,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022640245] [2020-10-27 01:33:22,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:33:22,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:33:22,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:33:22,311 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 01:33:22,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:22,423 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 01:33:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:33:22,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:33:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:22,441 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:33:22,441 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 01:33:22,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:33:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 01:33:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 01:33:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 01:33:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 01:33:22,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 01:33:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:22,503 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 01:33:22,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:33:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 01:33:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:33:22,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:22,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:22,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:33:22,506 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:22,507 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 01:33:22,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:22,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749796999] [2020-10-27 01:33:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:22,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:22,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:33:22,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:22,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 01:33:22,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:22,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:33:22,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:22,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:33:22,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:22,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:22,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:22,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:22,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:22,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:33:22,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:22,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:22,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:22,822 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 01:33:22,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749796999] [2020-10-27 01:33:22,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:33:22,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:33:22,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661445263] [2020-10-27 01:33:22,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:33:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:22,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:33:22,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:33:22,826 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-27 01:33:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:22,891 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 01:33:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:33:22,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:33:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:22,893 INFO L225 Difference]: With dead ends: 20 [2020-10-27 01:33:22,893 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:33:22,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:33:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:33:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:33:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:33:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 01:33:22,902 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 01:33:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:22,903 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 01:33:22,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:33:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 01:33:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:33:22,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:22,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:22,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:33:22,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:22,905 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 01:33:22,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:22,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266126582] [2020-10-27 01:33:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:22,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:23,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:33:23,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:23,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 01:33:23,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:23,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:33:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:33:23,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:23,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:23,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:23,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:23,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:33:23,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:23,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:23,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266126582] [2020-10-27 01:33:23,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:23,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:33:23,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456788265] [2020-10-27 01:33:23,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:33:23,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:23,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:33:23,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:33:23,106 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-27 01:33:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:23,231 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 01:33:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:33:23,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:33:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:23,232 INFO L225 Difference]: With dead ends: 21 [2020-10-27 01:33:23,233 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:33:23,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:33:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:33:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:33:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:33:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:33:23,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:33:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:23,240 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:33:23,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:33:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:33:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:33:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:23,241 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:23,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:33:23,242 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 01:33:23,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:23,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432939106] [2020-10-27 01:33:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:23,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:23,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:33:23,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:23,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 01:33:23,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:33:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:33:23,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:23,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:23,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:23,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:23,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:33:23,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:23,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:23,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432939106] [2020-10-27 01:33:23,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:23,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:33:23,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413819029] [2020-10-27 01:33:23,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:33:23,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:33:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:33:23,517 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-27 01:33:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:23,705 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 01:33:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:33:23,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-27 01:33:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:23,707 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:33:23,707 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:33:23,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:33:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:33:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:33:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:33:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:33:23,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 01:33:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:23,714 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:33:23,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:33:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:33:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:33:23,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:23,715 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:23,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:33:23,716 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 01:33:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:23,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967843944] [2020-10-27 01:33:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:23,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:23,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:33:23,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 01:33:23,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:33:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:33:23,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:23,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:23,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:23,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:33:23,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:23,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:23,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967843944] [2020-10-27 01:33:23,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:23,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:33:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890392060] [2020-10-27 01:33:23,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:33:23,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:23,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:33:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:33:23,950 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 01:33:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:24,188 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 01:33:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:33:24,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 01:33:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:24,190 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:33:24,190 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:33:24,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:33:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:33:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:33:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:33:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 01:33:24,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 01:33:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:24,198 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 01:33:24,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:33:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 01:33:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:33:24,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:24,199 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:24,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:33:24,200 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 01:33:24,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:24,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773899491] [2020-10-27 01:33:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:24,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:24,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:24,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:33:24,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:24,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 01:33:24,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:33:24,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:33:24,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:33:24,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:24,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:24,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:24,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:24,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:33:24,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:24,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:24,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:24,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773899491] [2020-10-27 01:33:24,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:24,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:33:24,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121698835] [2020-10-27 01:33:24,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:33:24,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:24,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:33:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:33:24,594 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 01:33:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:24,893 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:33:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:33:24,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:33:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:24,895 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:33:24,895 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:33:24,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:33:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:33:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:33:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:33:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:33:24,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 01:33:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:24,912 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:33:24,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:33:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:33:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:33:24,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:24,914 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:24,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:33:24,914 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:24,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 01:33:24,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:24,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417178360] [2020-10-27 01:33:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:24,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:25,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:33:25,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:25,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 01:33:25,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:25,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:33:25,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:25,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:33:25,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:25,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:25,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:25,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:25,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:25,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:33:25,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:25,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:25,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:25,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417178360] [2020-10-27 01:33:25,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:25,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:33:25,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613466058] [2020-10-27 01:33:25,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:33:25,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:25,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:33:25,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:33:25,339 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 01:33:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:25,669 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 01:33:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:33:25,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:33:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:25,670 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:33:25,670 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:33:25,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:33:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:33:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:33:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:33:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 01:33:25,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 01:33:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:25,681 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 01:33:25,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:33:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 01:33:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:33:25,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:25,682 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:25,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:33:25,682 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:25,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 01:33:25,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:25,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529219265] [2020-10-27 01:33:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:25,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:25,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:33:25,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:25,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 01:33:25,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:25,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:33:25,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:25,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:33:25,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:25,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:25,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:25,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:25,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:25,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:25,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:25,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529219265] [2020-10-27 01:33:25,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:25,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:33:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903555187] [2020-10-27 01:33:25,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:33:25,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:25,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:33:25,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:33:25,997 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-27 01:33:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:26,484 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 01:33:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:33:26,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-27 01:33:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:26,486 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:33:26,486 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:33:26,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:33:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:33:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:33:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:33:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 01:33:26,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 01:33:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:26,495 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 01:33:26,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:33:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 01:33:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:33:26,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:26,496 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:26,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:33:26,496 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-27 01:33:26,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:26,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536060176] [2020-10-27 01:33:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:26,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:33:26,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 01:33:26,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:33:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:33:26,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:26,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:26,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:26,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:26,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:26,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:33:26,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:26,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:26,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:26,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:26,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:26,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536060176] [2020-10-27 01:33:26,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:26,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:33:26,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438579896] [2020-10-27 01:33:26,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:33:26,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:33:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:33:26,876 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-27 01:33:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:27,343 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-27 01:33:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:33:27,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 01:33:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:27,345 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:33:27,345 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:33:27,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:33:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:33:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:33:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:33:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 01:33:27,352 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-27 01:33:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:27,352 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 01:33:27,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:33:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 01:33:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:33:27,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:27,353 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:27,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:33:27,354 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:27,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-27 01:33:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:27,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37186286] [2020-10-27 01:33:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:27,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:27,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:27,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:33:27,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 01:33:27,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:33:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:33:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:27,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:27,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:27,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:27,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:33:27,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:27,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37186286] [2020-10-27 01:33:27,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:27,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:33:27,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195322628] [2020-10-27 01:33:27,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:33:27,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:33:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:33:27,773 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-27 01:33:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:28,308 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 01:33:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:33:28,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-27 01:33:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:28,309 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:33:28,309 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:33:28,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:33:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:33:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:33:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:33:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 01:33:28,319 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-27 01:33:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:28,319 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 01:33:28,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:33:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 01:33:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:33:28,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:28,320 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:28,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:33:28,321 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:28,321 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-27 01:33:28,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:28,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366080464] [2020-10-27 01:33:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:28,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:28,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:28,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:33:28,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:28,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-27 01:33:28,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:28,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:33:28,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:28,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:33:28,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:28,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:28,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:28,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:28,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:28,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:28,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:28,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:28,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:28,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366080464] [2020-10-27 01:33:28,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:28,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:33:28,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405419414] [2020-10-27 01:33:28,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:33:28,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:28,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:33:28,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:33:28,789 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-27 01:33:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:29,363 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-27 01:33:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:33:29,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 01:33:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:29,364 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:33:29,364 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:33:29,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:33:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:33:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:33:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:33:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 01:33:29,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-27 01:33:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:29,373 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 01:33:29,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:33:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 01:33:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:33:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:29,374 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:29,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:33:29,374 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-27 01:33:29,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:29,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14115096] [2020-10-27 01:33:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:29,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:29,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:33:29,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:29,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 01:33:29,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:29,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:33:29,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:29,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:33:29,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:29,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:29,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:29,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:29,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:29,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:29,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:29,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:29,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:29,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:29,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:29,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14115096] [2020-10-27 01:33:29,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:29,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:33:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259690823] [2020-10-27 01:33:29,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:33:29,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:29,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:33:29,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:33:29,868 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-27 01:33:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:30,488 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 01:33:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:33:30,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-27 01:33:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:30,490 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:33:30,490 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:33:30,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:33:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:33:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:33:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:33:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 01:33:30,497 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-27 01:33:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:30,498 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 01:33:30,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:33:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 01:33:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:33:30,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:30,499 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:30,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:33:30,499 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:30,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-27 01:33:30,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:30,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858289863] [2020-10-27 01:33:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:30,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:30,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:30,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:33:30,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:30,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 01:33:30,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:33:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:33:30,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:31,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:31,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:31,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:31,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:31,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:31,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:33:31,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:31,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:31,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:31,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858289863] [2020-10-27 01:33:31,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:31,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:33:31,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010887874] [2020-10-27 01:33:31,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:33:31,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:31,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:33:31,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:33:31,056 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-27 01:33:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:31,796 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-27 01:33:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:33:31,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-27 01:33:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:31,798 INFO L225 Difference]: With dead ends: 31 [2020-10-27 01:33:31,798 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:33:31,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:33:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:33:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:33:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:33:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 01:33:31,809 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-27 01:33:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:31,810 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 01:33:31,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:33:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 01:33:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:33:31,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:31,814 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:31,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:33:31,815 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-27 01:33:31,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:31,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108867733] [2020-10-27 01:33:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:31,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:32,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:33:32,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:33:32,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:33:32,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:32,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:33:32,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:33:32,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:32,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:32,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:32,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:32,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:33:32,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:32,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:32,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:32,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:32,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:32,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108867733] [2020-10-27 01:33:32,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:32,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:33:32,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589044158] [2020-10-27 01:33:32,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:33:32,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:32,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:33:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:33:32,446 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-27 01:33:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:33,251 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 01:33:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:33:33,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-27 01:33:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:33,253 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:33:33,253 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:33:33,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:33:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:33:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 01:33:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:33:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 01:33:33,275 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-27 01:33:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:33,275 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 01:33:33,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:33:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 01:33:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:33:33,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:33,276 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:33,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:33:33,277 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:33,280 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-27 01:33:33,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:33,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041560742] [2020-10-27 01:33:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:33,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:33,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:33,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:33:33,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:33,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-27 01:33:33,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:33,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:33:33,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:33,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:33:33,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:34,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:34,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:34,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:34,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:34,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:34,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:34,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:34,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:34,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041560742] [2020-10-27 01:33:34,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:34,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:33:34,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792241328] [2020-10-27 01:33:34,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:33:34,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:33:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:33:34,083 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-27 01:33:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:34,948 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-27 01:33:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:33:34,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-27 01:33:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:34,950 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:33:34,950 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:33:34,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:33:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:33:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:33:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:33:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 01:33:34,958 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-27 01:33:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:34,958 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 01:33:34,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:33:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 01:33:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:33:34,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:34,959 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:34,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:33:34,959 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-27 01:33:34,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:34,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602403635] [2020-10-27 01:33:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:34,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:35,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:33:35,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:35,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-27 01:33:35,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:33:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:35,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:33:35,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:35,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:35,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:35,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:35,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:35,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:35,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:35,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602403635] [2020-10-27 01:33:35,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:35,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:33:35,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290724877] [2020-10-27 01:33:35,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:33:35,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:33:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:33:35,756 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-27 01:33:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:36,651 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 01:33:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:33:36,652 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-27 01:33:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:36,654 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:33:36,654 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:33:36,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:33:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:33:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 01:33:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:33:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 01:33:36,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-27 01:33:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:36,662 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 01:33:36,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:33:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 01:33:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:33:36,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:36,663 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:36,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:33:36,664 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:36,665 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-27 01:33:36,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:36,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347881231] [2020-10-27 01:33:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:37,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:37,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:33:37,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:37,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 01:33:37,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:33:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:33:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:37,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:37,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:37,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:37,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:37,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:37,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:37,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:37,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:37,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347881231] [2020-10-27 01:33:37,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:37,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:33:37,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136379866] [2020-10-27 01:33:37,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:33:37,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:33:37,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:33:37,508 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-27 01:33:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:38,547 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-27 01:33:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:33:38,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-27 01:33:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:38,549 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:33:38,549 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:33:38,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:33:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:33:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:33:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:33:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 01:33:38,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-27 01:33:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:38,566 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 01:33:38,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:33:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 01:33:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:33:38,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:38,567 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:38,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:33:38,569 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-27 01:33:38,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:38,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053328460] [2020-10-27 01:33:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:38,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:39,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:39,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:33:39,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:39,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-27 01:33:39,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:39,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:33:39,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:39,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:33:39,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:39,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:39,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:39,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:39,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:39,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:39,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:33:39,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:39,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:39,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053328460] [2020-10-27 01:33:39,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:39,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:33:39,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998007698] [2020-10-27 01:33:39,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:33:39,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:33:39,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:33:39,551 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-27 01:33:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:40,789 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 01:33:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:33:40,790 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-27 01:33:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:40,791 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:33:40,791 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:33:40,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:33:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:33:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:33:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:33:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 01:33:40,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-27 01:33:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:40,801 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 01:33:40,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:33:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 01:33:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:33:40,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:40,802 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:40,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:33:40,802 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-27 01:33:40,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:40,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526380691] [2020-10-27 01:33:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:40,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:41,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:41,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:33:41,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-27 01:33:41,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:33:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:33:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:41,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:41,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:41,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:41,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:41,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:41,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:41,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526380691] [2020-10-27 01:33:41,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:41,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:33:41,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320943344] [2020-10-27 01:33:41,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:33:41,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:33:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:33:41,878 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-27 01:33:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:43,080 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 01:33:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:33:43,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-27 01:33:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:43,082 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:33:43,082 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:33:43,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:33:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:33:43,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:33:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:33:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 01:33:43,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-27 01:33:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:43,091 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 01:33:43,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:33:43,091 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 01:33:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:33:43,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:43,092 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:43,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:33:43,092 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-27 01:33:43,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:43,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934356350] [2020-10-27 01:33:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:43,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:43,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:43,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:33:43,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:43,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-27 01:33:43,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:33:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:33:43,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:44,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:44,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:44,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:44,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:44,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:44,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:44,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:44,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934356350] [2020-10-27 01:33:44,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:44,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:33:44,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042767428] [2020-10-27 01:33:44,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:33:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:33:44,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:33:44,104 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-27 01:33:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:45,457 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:33:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:33:45,458 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-27 01:33:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:45,458 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:33:45,459 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:33:45,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:33:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:33:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 01:33:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:33:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 01:33:45,467 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-27 01:33:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:45,468 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 01:33:45,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:33:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 01:33:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:33:45,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:45,469 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:45,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:33:45,469 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-27 01:33:45,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:45,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990626318] [2020-10-27 01:33:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:46,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:33:46,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:46,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-27 01:33:46,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:33:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:33:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:46,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:46,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:46,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:46,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:46,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:46,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:46,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:46,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990626318] [2020-10-27 01:33:46,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:46,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:33:46,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122286984] [2020-10-27 01:33:46,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:33:46,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:33:46,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:33:46,602 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-27 01:33:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:47,967 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-27 01:33:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:33:47,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-27 01:33:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:47,969 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:33:47,969 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:33:47,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:33:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:33:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:33:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:33:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 01:33:47,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-27 01:33:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:47,986 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 01:33:47,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:33:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 01:33:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:33:47,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:47,987 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:47,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:33:47,987 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:47,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-27 01:33:47,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:47,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202645837] [2020-10-27 01:33:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:48,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:48,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:48,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:33:48,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:48,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-27 01:33:48,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:33:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:33:48,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:49,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:49,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:49,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:49,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:49,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:49,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:49,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:49,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:49,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:49,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:49,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202645837] [2020-10-27 01:33:49,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:49,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:33:49,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786531500] [2020-10-27 01:33:49,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:33:49,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:33:49,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:33:49,282 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-27 01:33:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:50,810 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:33:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:33:50,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-27 01:33:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:50,821 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:33:50,821 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:33:50,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:33:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:33:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 01:33:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:33:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 01:33:50,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-27 01:33:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:50,833 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 01:33:50,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:33:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 01:33:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:33:50,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:50,834 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:50,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:33:50,834 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-27 01:33:50,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:50,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226674483] [2020-10-27 01:33:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:50,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:51,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:33:51,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-27 01:33:51,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:33:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:33:51,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:52,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:52,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:52,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:52,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:52,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:52,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:52,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:52,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:52,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:52,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:52,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226674483] [2020-10-27 01:33:52,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:52,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:33:52,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206701946] [2020-10-27 01:33:52,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:33:52,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:52,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:33:52,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:33:52,190 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-27 01:33:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:53,882 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-27 01:33:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:33:53,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-27 01:33:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:53,884 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:33:53,884 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:33:53,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:33:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:33:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:33:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:33:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 01:33:53,894 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-27 01:33:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:53,894 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 01:33:53,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:33:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 01:33:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:33:53,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:53,895 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:53,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:33:53,895 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-27 01:33:53,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:53,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127401432] [2020-10-27 01:33:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:53,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:54,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:54,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:33:54,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-27 01:33:54,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:33:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:33:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:55,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:55,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:55,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:55,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:33:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:55,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127401432] [2020-10-27 01:33:55,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:55,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:33:55,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051153909] [2020-10-27 01:33:55,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:33:55,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:33:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:33:55,247 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-27 01:33:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:56,954 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 01:33:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:33:56,955 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-27 01:33:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:56,955 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:33:56,955 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:33:56,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:33:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:33:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 01:33:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:33:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 01:33:56,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-27 01:33:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:56,965 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 01:33:56,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:33:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 01:33:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:33:56,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:56,965 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:56,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:33:56,966 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-27 01:33:56,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:56,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855499830] [2020-10-27 01:33:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:56,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:57,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:57,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:33:57,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:57,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 740 [2020-10-27 01:33:57,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:33:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:33:57,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:58,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:58,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:58,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:58,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:58,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:58,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:58,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:58,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:58,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:58,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:58,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855499830] [2020-10-27 01:33:58,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:58,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:33:58,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183883790] [2020-10-27 01:33:58,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:33:58,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:58,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:33:58,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:33:58,417 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-27 01:34:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:00,287 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-27 01:34:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:34:00,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-27 01:34:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:00,288 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:34:00,289 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:34:00,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:34:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:34:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:34:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:34:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 01:34:00,296 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-27 01:34:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:00,296 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 01:34:00,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:34:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 01:34:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:34:00,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:00,297 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:00,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:34:00,298 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-27 01:34:00,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:00,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137253517] [2020-10-27 01:34:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:01,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:01,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:34:01,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:01,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-27 01:34:01,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:01,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:34:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:34:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:02,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:02,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:02,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:02,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:02,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:02,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:02,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137253517] [2020-10-27 01:34:02,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:02,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:34:02,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246386794] [2020-10-27 01:34:02,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:34:02,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:34:02,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:34:02,015 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-27 01:34:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:04,105 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 01:34:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:34:04,111 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-27 01:34:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:04,112 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:34:04,112 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:34:04,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:34:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:34:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:34:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:34:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 01:34:04,120 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-27 01:34:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:04,121 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 01:34:04,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:34:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 01:34:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:34:04,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:04,121 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:04,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:34:04,122 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-27 01:34:04,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:04,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776171278] [2020-10-27 01:34:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:04,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:34:05,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:05,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-27 01:34:05,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:34:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:34:05,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:05,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:05,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:05,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:05,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:05,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:05,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:05,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776171278] [2020-10-27 01:34:05,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:05,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:34:05,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932495432] [2020-10-27 01:34:05,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:34:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:34:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:34:05,826 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-27 01:34:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:07,878 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-27 01:34:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:34:07,879 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-27 01:34:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:07,879 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:34:07,880 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:34:07,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:34:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:34:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:34:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:34:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 01:34:07,889 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-27 01:34:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:07,889 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 01:34:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:34:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 01:34:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:34:07,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:07,890 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:07,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:34:07,890 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-27 01:34:07,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:07,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332722306] [2020-10-27 01:34:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:07,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:08,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:34:08,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:08,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-27 01:34:08,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:34:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:34:08,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:09,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:09,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:09,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:09,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:09,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:09,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:09,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:09,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:09,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332722306] [2020-10-27 01:34:09,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:09,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:34:09,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258763784] [2020-10-27 01:34:09,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:34:09,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:09,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:34:09,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:34:09,636 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-27 01:34:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:11,872 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:34:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:34:11,872 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-27 01:34:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:11,873 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:34:11,873 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:34:11,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:34:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:34:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:34:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:34:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 01:34:11,888 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-27 01:34:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:11,888 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 01:34:11,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:34:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 01:34:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:34:11,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:11,889 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:11,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:34:11,889 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:11,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-27 01:34:11,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:11,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573594399] [2020-10-27 01:34:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:11,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:12,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:12,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:34:12,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:12,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-27 01:34:12,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:12,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:34:12,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:12,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:34:12,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:13,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:13,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:13,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:13,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:13,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:13,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:13,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:13,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:13,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573594399] [2020-10-27 01:34:13,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:13,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:34:13,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118216365] [2020-10-27 01:34:13,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:34:13,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:13,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:34:13,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:34:13,675 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-27 01:34:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:16,118 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-27 01:34:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:34:16,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-27 01:34:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:16,120 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:34:16,120 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:34:16,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:34:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:34:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:34:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:34:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 01:34:16,129 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-27 01:34:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:16,129 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 01:34:16,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:34:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 01:34:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:34:16,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:16,130 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:16,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:34:16,131 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-27 01:34:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:16,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780302703] [2020-10-27 01:34:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:16,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:34:16,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:16,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-27 01:34:16,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:34:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:34:16,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:17,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:17,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:17,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:17,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:17,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:17,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780302703] [2020-10-27 01:34:17,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:17,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:34:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040642522] [2020-10-27 01:34:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:34:17,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:34:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:34:17,866 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-27 01:34:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:20,421 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 01:34:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:34:20,422 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-27 01:34:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:20,422 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:34:20,422 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:34:20,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:34:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:34:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:34:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:34:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 01:34:20,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-27 01:34:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:20,432 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 01:34:20,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:34:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 01:34:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:34:20,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:20,433 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:20,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:34:20,433 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-27 01:34:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:20,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853112066] [2020-10-27 01:34:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:20,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:34:21,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:22,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:22,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853112066] [2020-10-27 01:34:22,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:22,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:34:22,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695028082] [2020-10-27 01:34:22,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:34:22,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:34:22,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:34:22,143 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-27 01:34:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:24,984 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-27 01:34:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:34:24,986 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-27 01:34:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:24,987 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:34:24,987 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:34:24,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:34:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:34:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:34:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:34:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 01:34:24,994 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-27 01:34:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:24,994 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 01:34:24,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:34:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 01:34:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:34:24,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:24,995 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:24,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:34:24,995 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-27 01:34:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:24,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632291045] [2020-10-27 01:34:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:25,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:25,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:25,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:34:25,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:25,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-27 01:34:25,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:34:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:34:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:26,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:26,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:26,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:26,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:26,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:26,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:26,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:27,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632291045] [2020-10-27 01:34:27,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:27,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:34:27,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231819249] [2020-10-27 01:34:27,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:34:27,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:34:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:34:27,008 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-27 01:34:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:29,753 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 01:34:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:34:29,753 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-27 01:34:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:29,754 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:34:29,754 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:34:29,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:34:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:34:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 01:34:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:34:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 01:34:29,764 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-27 01:34:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:29,764 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 01:34:29,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:34:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 01:34:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:34:29,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:29,765 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:29,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:34:29,765 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-27 01:34:29,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:29,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934554761] [2020-10-27 01:34:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:29,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:30,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:34:30,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:31,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:31,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:31,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:31,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:31,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:31,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:31,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:31,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:31,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:31,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:31,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934554761] [2020-10-27 01:34:31,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:31,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:34:31,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583295787] [2020-10-27 01:34:31,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:34:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:34:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:34:31,869 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-27 01:34:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:35,050 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-27 01:34:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:34:35,051 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-27 01:34:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:35,052 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:34:35,052 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:34:35,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:34:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:34:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:34:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:34:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 01:34:35,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-27 01:34:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:35,059 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 01:34:35,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:34:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 01:34:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:34:35,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:35,060 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:35,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:34:35,060 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-27 01:34:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:35,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470914780] [2020-10-27 01:34:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:35,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:36,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:34:36,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:36,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-27 01:34:36,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:34:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:34:36,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:37,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:37,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:37,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:37,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470914780] [2020-10-27 01:34:37,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:37,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:34:37,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586717633] [2020-10-27 01:34:37,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:34:37,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:34:37,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:34:37,407 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-27 01:34:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:40,621 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 01:34:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:34:40,621 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-27 01:34:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:40,622 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:34:40,622 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:34:40,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:34:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:34:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 01:34:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:34:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 01:34:40,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-27 01:34:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:40,632 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 01:34:40,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:34:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 01:34:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:34:40,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:40,633 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:40,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:34:40,633 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-27 01:34:40,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:40,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96510649] [2020-10-27 01:34:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:41,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:41,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:34:41,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:41,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-27 01:34:41,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:41,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:34:41,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:41,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:34:41,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:42,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:42,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:42,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:42,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96510649] [2020-10-27 01:34:42,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:42,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:34:42,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333130440] [2020-10-27 01:34:42,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:34:42,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:34:42,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:34:42,902 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-27 01:34:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:46,402 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-27 01:34:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:34:46,402 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-27 01:34:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:46,403 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:34:46,403 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:34:46,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:34:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:34:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:34:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:34:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 01:34:46,413 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-27 01:34:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:46,413 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 01:34:46,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:34:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 01:34:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:34:46,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:46,414 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:46,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:34:46,414 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-27 01:34:46,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:46,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114135494] [2020-10-27 01:34:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:47,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:47,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:34:47,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:47,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-27 01:34:47,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:34:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:34:47,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:49,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:49,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:49,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:49,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:49,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:49,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:49,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:49,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:49,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114135494] [2020-10-27 01:34:49,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:49,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:34:49,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846312226] [2020-10-27 01:34:49,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:34:49,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:49,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:34:49,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:34:49,268 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-27 01:34:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:52,663 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 01:34:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:34:52,664 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-27 01:34:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:52,664 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:34:52,665 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:34:52,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:34:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:34:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:34:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:34:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 01:34:52,671 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-27 01:34:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:52,671 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 01:34:52,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:34:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 01:34:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:34:52,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:52,673 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:52,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:34:52,673 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-27 01:34:52,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:52,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924703539] [2020-10-27 01:34:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:52,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:54,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:54,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:34:54,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:54,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1540 [2020-10-27 01:34:54,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:34:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:34:54,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:55,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:55,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:55,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:55,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:55,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:55,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:55,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:55,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:55,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924703539] [2020-10-27 01:34:55,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:55,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:34:55,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706721141] [2020-10-27 01:34:55,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:34:55,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:34:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:34:55,606 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-27 01:34:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:59,359 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-27 01:34:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:34:59,360 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-27 01:34:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:59,361 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:34:59,361 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:34:59,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:34:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:34:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:34:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:34:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 01:34:59,370 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-27 01:34:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:59,370 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 01:34:59,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:34:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 01:34:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:34:59,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:59,371 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:59,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:34:59,372 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-27 01:34:59,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:59,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066598922] [2020-10-27 01:34:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:59,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:00,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:00,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:35:00,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:00,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-27 01:35:00,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:00,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:35:00,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:00,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:35:00,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:01,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:01,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:01,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:01,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:01,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:01,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:01,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:01,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066598922] [2020-10-27 01:35:01,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:01,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:35:01,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675028027] [2020-10-27 01:35:01,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:35:01,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:01,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:35:01,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:35:01,870 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-27 01:35:05,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:05,692 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 01:35:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:35:05,693 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-27 01:35:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:05,694 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:35:05,694 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:35:05,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:35:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:35:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 01:35:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:35:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 01:35:05,701 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-27 01:35:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:05,702 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 01:35:05,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:35:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 01:35:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:35:05,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:05,702 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:05,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:35:05,703 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-27 01:35:05,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:05,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264320647] [2020-10-27 01:35:05,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:05,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:35:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:08,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:08,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:08,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:08,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:08,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:08,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:08,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:08,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:08,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264320647] [2020-10-27 01:35:08,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:08,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:35:08,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172800452] [2020-10-27 01:35:08,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:35:08,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:35:08,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:35:08,242 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-27 01:35:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:12,407 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-27 01:35:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:35:12,407 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-27 01:35:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:12,408 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:35:12,409 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:35:12,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:35:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:35:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:35:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:35:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 01:35:12,418 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-27 01:35:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:12,418 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 01:35:12,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:35:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 01:35:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:35:12,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:12,418 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:12,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:35:12,419 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-27 01:35:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:12,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238203124] [2020-10-27 01:35:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1618 [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:14,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:35:14,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:15,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:15,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:15,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:15,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:15,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:15,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:15,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:15,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:15,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238203124] [2020-10-27 01:35:15,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:15,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:35:15,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065316692] [2020-10-27 01:35:15,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:35:15,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:15,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:35:15,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:35:15,685 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-27 01:35:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:20,268 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 01:35:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:35:20,269 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-27 01:35:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:20,270 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:35:20,270 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:35:20,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:35:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:35:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:35:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:35:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 01:35:20,280 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-27 01:35:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:20,281 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 01:35:20,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:35:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 01:35:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:35:20,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:20,282 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:20,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:35:20,282 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-27 01:35:20,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:20,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100070247] [2020-10-27 01:35:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:20,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:22,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:35:22,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:23,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:23,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:23,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:23,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100070247] [2020-10-27 01:35:23,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:23,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:35:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32247981] [2020-10-27 01:35:23,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:35:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:35:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:35:23,917 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-27 01:35:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:28,664 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-27 01:35:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:35:28,665 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-27 01:35:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:28,666 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:35:28,666 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:35:28,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:35:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:35:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:35:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:35:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 01:35:28,677 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-27 01:35:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:28,677 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 01:35:28,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:35:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 01:35:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:35:28,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:28,678 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:28,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:35:28,679 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-27 01:35:28,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:28,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707668659] [2020-10-27 01:35:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:28,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:35:29,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:31,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:31,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:31,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:31,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:31,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:31,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:31,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:31,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:31,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:31,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:31,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:31,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707668659] [2020-10-27 01:35:31,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:31,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:35:31,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163879761] [2020-10-27 01:35:31,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:35:31,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:31,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:35:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:35:31,750 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-27 01:35:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:36,732 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 01:35:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:35:36,733 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-27 01:35:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:36,734 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:35:36,734 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:35:36,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:35:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:35:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 01:35:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:35:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 01:35:36,742 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-27 01:35:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:36,743 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 01:35:36,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:35:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 01:35:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:35:36,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:36,743 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:36,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:35:36,744 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-27 01:35:36,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:36,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221987521] [2020-10-27 01:35:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:36,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2009 [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:35:38,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:40,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:40,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:40,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:40,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:40,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:40,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:40,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:40,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221987521] [2020-10-27 01:35:40,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:40,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:35:40,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932037961] [2020-10-27 01:35:40,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:35:40,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:35:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:35:40,687 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-27 01:35:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:45,768 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 01:35:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:35:45,768 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-27 01:35:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:45,769 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:35:45,770 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:35:45,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:35:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:35:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:35:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:35:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 01:35:45,777 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-27 01:35:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:45,777 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 01:35:45,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:35:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 01:35:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:35:45,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:45,778 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:45,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:35:45,778 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:45,779 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-27 01:35:45,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:45,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243322793] [2020-10-27 01:35:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:45,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:47,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1790 [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:35:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:49,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:49,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:49,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:49,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:49,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:49,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:49,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:49,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:49,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:49,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:49,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:49,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243322793] [2020-10-27 01:35:49,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:49,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:35:49,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263131962] [2020-10-27 01:35:49,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:35:49,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:35:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:35:49,606 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-27 01:35:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:54,904 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 01:35:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:35:54,905 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-27 01:35:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:54,906 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:35:54,906 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:35:54,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:35:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:35:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:35:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:35:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 01:35:54,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-27 01:35:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:54,915 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 01:35:54,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:35:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 01:35:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:35:54,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:54,916 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:54,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:35:54,916 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-27 01:35:54,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:54,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748813034] [2020-10-27 01:35:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:54,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2147 [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:35:57,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:59,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:59,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:59,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:59,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:59,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748813034] [2020-10-27 01:35:59,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:59,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:35:59,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923973983] [2020-10-27 01:35:59,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:35:59,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:35:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:35:59,169 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-27 01:36:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:04,576 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-27 01:36:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:36:04,576 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-27 01:36:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:04,577 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:36:04,578 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:36:04,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:36:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:36:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:36:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:36:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 01:36:04,585 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-27 01:36:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:04,585 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 01:36:04,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:36:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 01:36:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:36:04,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:04,586 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:04,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:36:04,586 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-27 01:36:04,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:04,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783022943] [2020-10-27 01:36:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:06,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:06,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:36:06,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:06,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1952 [2020-10-27 01:36:06,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:36:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:36:06,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:08,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:08,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:08,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:08,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:08,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:08,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:08,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:08,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:08,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783022943] [2020-10-27 01:36:08,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:08,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:36:08,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77517508] [2020-10-27 01:36:08,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:36:08,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:08,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:36:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:36:08,726 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-27 01:36:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:14,485 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 01:36:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:36:14,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-27 01:36:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:14,487 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:36:14,487 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:36:14,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:36:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:36:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 01:36:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:36:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 01:36:14,495 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-27 01:36:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:14,495 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 01:36:14,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:36:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 01:36:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:36:14,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:14,496 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:14,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:36:14,496 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:14,496 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-27 01:36:14,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:14,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463091313] [2020-10-27 01:36:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:14,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:17,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:17,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:36:17,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2696 [2020-10-27 01:36:17,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:36:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:36:17,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:19,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:19,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:19,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:19,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:19,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:19,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:19,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:19,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:19,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:19,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:19,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463091313] [2020-10-27 01:36:19,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:19,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:36:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869146722] [2020-10-27 01:36:19,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:36:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:36:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:36:19,495 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-27 01:36:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:25,614 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-27 01:36:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:36:25,615 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-27 01:36:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:25,616 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:36:25,616 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:36:25,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:36:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:36:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:36:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:36:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 01:36:25,632 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-27 01:36:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:25,632 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 01:36:25,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:36:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 01:36:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:36:25,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:25,633 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:25,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:36:25,633 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-27 01:36:25,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:25,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678317819] [2020-10-27 01:36:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:25,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:27,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:27,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:36:27,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:27,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2322 [2020-10-27 01:36:27,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:36:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:36:27,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:30,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:30,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678317819] [2020-10-27 01:36:30,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:30,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:36:30,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985680238] [2020-10-27 01:36:30,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:36:30,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:30,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:36:30,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:36:30,357 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-27 01:36:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:36,651 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 01:36:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:36:36,652 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-27 01:36:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:36,654 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:36:36,654 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:36:36,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:36:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:36:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 01:36:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:36:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 01:36:36,662 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-27 01:36:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:36,663 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 01:36:36,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:36:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 01:36:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:36:36,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:36,664 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:36,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:36:36,664 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-27 01:36:36,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:36,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069644378] [2020-10-27 01:36:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:36,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:39,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:39,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:36:39,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:39,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2471 [2020-10-27 01:36:39,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:36:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:36:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:41,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:41,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:41,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:41,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:41,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:41,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069644378] [2020-10-27 01:36:41,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:41,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:36:41,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787719835] [2020-10-27 01:36:41,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:36:41,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:36:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:36:41,673 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 51 states. [2020-10-27 01:36:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:48,425 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-27 01:36:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:36:48,426 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-27 01:36:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:48,427 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:36:48,428 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:36:48,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:36:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:36:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:36:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:36:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 01:36:48,437 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-27 01:36:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:48,437 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 01:36:48,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:36:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 01:36:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:36:48,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:48,438 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:48,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:36:48,438 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:48,438 INFO L82 PathProgramCache]: Analyzing trace with hash -684175657, now seen corresponding path program 48 times [2020-10-27 01:36:48,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:48,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684527730] [2020-10-27 01:36:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:48,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:51,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:51,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:36:51,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:51,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2977 [2020-10-27 01:36:51,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:51,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:36:51,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:51,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:36:51,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:54,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:54,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:54,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:54,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:54,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:54,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:36:54,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:54,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:54,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684527730] [2020-10-27 01:36:54,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:54,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:36:54,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396256523] [2020-10-27 01:36:54,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:36:54,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:36:54,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:36:54,061 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 52 states. [2020-10-27 01:37:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:00,876 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 01:37:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:37:00,877 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-27 01:37:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:00,877 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:37:00,878 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:37:00,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:37:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:37:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 01:37:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:37:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 01:37:00,888 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-27 01:37:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:00,888 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 01:37:00,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:37:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 01:37:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:37:00,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:00,889 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:00,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:37:00,889 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1395679230, now seen corresponding path program 49 times [2020-10-27 01:37:00,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:00,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882603722] [2020-10-27 01:37:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:00,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2113 [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:37:03,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:05,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:05,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:05,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:05,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:05,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:05,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:05,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:05,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882603722] [2020-10-27 01:37:05,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:05,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:37:05,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662674662] [2020-10-27 01:37:05,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:37:05,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:05,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:37:05,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:37:05,771 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 53 states. [2020-10-27 01:37:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:12,997 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-27 01:37:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:37:12,998 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 61 [2020-10-27 01:37:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:12,999 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:37:12,999 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:37:13,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:37:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:37:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 01:37:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:37:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-27 01:37:13,009 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-10-27 01:37:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:13,009 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-27 01:37:13,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:37:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-27 01:37:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:37:13,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:13,010 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:13,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:37:13,010 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1446671287, now seen corresponding path program 50 times [2020-10-27 01:37:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:13,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789171813] [2020-10-27 01:37:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:13,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking...