/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-new/count_by_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:21:53,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:21:53,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:21:53,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:21:53,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:21:53,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:21:53,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:21:53,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:21:53,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:21:53,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:21:53,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:21:53,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:21:53,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:21:53,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:21:53,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:21:53,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:21:53,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:21:53,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:21:53,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:21:53,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:21:53,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:21:53,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:21:53,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:21:53,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:21:53,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:21:53,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:21:53,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:21:53,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:21:53,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:21:53,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:21:53,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:21:53,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:21:53,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:21:53,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:21:53,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:21:53,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:21:53,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:21:53,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:21:53,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:21:53,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:21:53,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:21:53,348 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:21:53,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:21:53,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:21:53,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:21:53,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:21:53,402 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:21:53,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:21:53,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:21:53,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:21:53,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:21:53,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:21:53,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:21:53,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:21:53,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:21:53,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:21:53,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:21:53,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:21:53,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:21:53,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:21:53,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:21:53,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:21:53,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:21:53,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:21:53,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:21:53,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:21:53,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:21:53,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:21:53,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:21:53,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:21:53,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:21:53,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:21:53,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:21:53,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:21:53,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:21:53,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:21:53,883 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:21:53,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2020-10-27 20:21:53,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f1a92413/66cb9e03fe564fd18af998a25dc73e69/FLAG9852d9d2e [2020-10-27 20:21:54,574 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:21:54,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_nondet.i [2020-10-27 20:21:54,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f1a92413/66cb9e03fe564fd18af998a25dc73e69/FLAG9852d9d2e [2020-10-27 20:21:54,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f1a92413/66cb9e03fe564fd18af998a25dc73e69 [2020-10-27 20:21:54,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:21:54,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:21:54,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:21:54,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:21:54,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:21:54,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:21:54" (1/1) ... [2020-10-27 20:21:54,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66361e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:54, skipping insertion in model container [2020-10-27 20:21:54,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:21:54" (1/1) ... [2020-10-27 20:21:54,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:21:55,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:21:55,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:21:55,228 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:21:55,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:21:55,267 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:21:55,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55 WrapperNode [2020-10-27 20:21:55,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:21:55,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:21:55,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:21:55,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:21:55,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... [2020-10-27 20:21:55,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... [2020-10-27 20:21:55,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... [2020-10-27 20:21:55,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... [2020-10-27 20:21:55,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... [2020-10-27 20:21:55,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... [2020-10-27 20:21:55,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... [2020-10-27 20:21:55,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:21:55,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:21:55,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:21:55,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:21:55,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:21:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:21:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:21:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:21:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:21:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:21:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:21:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:21:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:21:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:21:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:21:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:21:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:21:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:21:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:21:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:21:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:21:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:21:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:21:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:21:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:21:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:21:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:21:55,685 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:21:55,685 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:21:55,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:21:55 BoogieIcfgContainer [2020-10-27 20:21:55,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:21:55,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:21:55,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:21:55,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:21:55,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:21:54" (1/3) ... [2020-10-27 20:21:55,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70732105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:21:55, skipping insertion in model container [2020-10-27 20:21:55,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:55" (2/3) ... [2020-10-27 20:21:55,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70732105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:21:55, skipping insertion in model container [2020-10-27 20:21:55,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:21:55" (3/3) ... [2020-10-27 20:21:55,698 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2020-10-27 20:21:55,726 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:21:55,737 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:21:55,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:21:55,822 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:21:55,822 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:21:55,822 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:21:55,823 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:21:55,823 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:21:55,823 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:21:55,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:21:55,823 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:21:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:21:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:21:55,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:55,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:55,884 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:55,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:55,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1451065749, now seen corresponding path program 1 times [2020-10-27 20:21:55,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:55,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017407365] [2020-10-27 20:21:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:56,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:56,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:21:56,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:21:56,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 20:21:56,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:56,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:21:56,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:56,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:56,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:56,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:21:56,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:56,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:56,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017407365] [2020-10-27 20:21:56,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:21:56,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:21:56,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336328791] [2020-10-27 20:21:56,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:21:56,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:56,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:21:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:21:56,533 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:21:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:56,603 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-27 20:21:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:21:56,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:21:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:56,613 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:21:56,613 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:21:56,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:21:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:21:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:21:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:21:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:21:56,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:21:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:56,659 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:21:56,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:21:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:21:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:21:56,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:56,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:56,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:21:56,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash 38839395, now seen corresponding path program 1 times [2020-10-27 20:21:56,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:56,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081462790] [2020-10-27 20:21:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:56,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:21:56,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:21:56,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-27 20:21:56,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:56,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:21:56,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:56,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:21:56,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:56,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:57,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:57,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:57,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:57,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:21:57,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:57,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:57,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:57,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:57,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:21:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:57,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081462790] [2020-10-27 20:21:57,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:21:57,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:21:57,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278630861] [2020-10-27 20:21:57,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:21:57,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:57,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:21:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:21:57,034 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-27 20:21:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:57,147 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:21:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:21:57,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:21:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:57,149 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:21:57,149 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:21:57,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:21:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:21:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-27 20:21:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:21:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:21:57,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-27 20:21:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:57,158 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:21:57,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:21:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:21:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:21:57,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:57,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:57,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:21:57,160 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:57,161 INFO L82 PathProgramCache]: Analyzing trace with hash -660511009, now seen corresponding path program 1 times [2020-10-27 20:21:57,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:57,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601744929] [2020-10-27 20:21:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:57,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:57,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:57,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:57,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:21:57,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:21:57,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 20:21:57,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:57,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:21:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:21:57,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:57,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:57,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:57,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:57,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:57,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:57,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:21:57,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:57,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:57,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:57,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:57,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:57,445 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 20:21:57,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601744929] [2020-10-27 20:21:57,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:57,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:21:57,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808313954] [2020-10-27 20:21:57,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:21:57,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:21:57,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:21:57,449 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 20:21:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:57,749 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 20:21:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:21:57,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 20:21:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:57,751 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:21:57,751 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:21:57,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:21:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:21:57,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:21:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:21:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 20:21:57,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-27 20:21:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:57,760 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 20:21:57,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:21:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 20:21:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:21:57,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:57,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:57,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:21:57,761 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1573616219, now seen corresponding path program 2 times [2020-10-27 20:21:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:57,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804315291] [2020-10-27 20:21:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:57,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:57,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:21:57,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 20:21:57,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:21:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:21:57,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:21:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:58,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:58,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:58,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:58,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:58,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:21:58,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:58,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:58,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:58,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:58,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:58,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804315291] [2020-10-27 20:21:58,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:58,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:21:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745320590] [2020-10-27 20:21:58,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:21:58,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:58,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:21:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:21:58,063 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2020-10-27 20:21:58,437 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-27 20:21:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:58,482 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 20:21:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:21:58,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-27 20:21:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:58,485 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:21:58,485 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:21:58,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:21:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:21:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:21:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:21:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 20:21:58,492 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-27 20:21:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:58,493 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 20:21:58,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:21:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 20:21:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:21:58,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:58,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:58,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:21:58,495 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1086234327, now seen corresponding path program 3 times [2020-10-27 20:21:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:58,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668759447] [2020-10-27 20:21:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:58,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:58,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:58,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:21:58,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-27 20:21:58,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:21:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:21:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:58,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:58,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:58,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:58,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:58,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:58,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:21:58,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:58,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:58,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:58,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:58,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:58,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668759447] [2020-10-27 20:21:58,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:58,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:21:58,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551852306] [2020-10-27 20:21:58,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:21:58,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:58,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:21:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:21:58,797 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-27 20:21:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:59,067 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 20:21:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:21:59,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-27 20:21:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:59,069 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:21:59,069 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:21:59,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:21:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:21:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:21:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:21:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 20:21:59,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-27 20:21:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:59,077 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 20:21:59,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:21:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 20:21:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:21:59,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:59,078 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:59,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:21:59,079 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash 863671379, now seen corresponding path program 4 times [2020-10-27 20:21:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:59,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768626770] [2020-10-27 20:21:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:59,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:59,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:21:59,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 20:21:59,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:21:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:21:59,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:59,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:59,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:59,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:59,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:59,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:21:59,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:59,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:59,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:59,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:59,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:59,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768626770] [2020-10-27 20:21:59,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:59,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:21:59,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488786588] [2020-10-27 20:21:59,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:21:59,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:59,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:21:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:21:59,329 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2020-10-27 20:21:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:59,658 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 20:21:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:21:59,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-27 20:21:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:59,659 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:21:59,659 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:21:59,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:21:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:21:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 20:21:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:21:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 20:21:59,666 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-27 20:21:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:59,667 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 20:21:59,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:21:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 20:21:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:21:59,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:59,668 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:59,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:21:59,668 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1729043151, now seen corresponding path program 5 times [2020-10-27 20:21:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:59,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564009004] [2020-10-27 20:21:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:59,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:59,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:21:59,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 20:21:59,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:21:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:21:59,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:59,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:59,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:59,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:21:59,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:59,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564009004] [2020-10-27 20:21:59,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:59,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:21:59,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356547138] [2020-10-27 20:21:59,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:21:59,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:21:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:21:59,954 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2020-10-27 20:22:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:00,289 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 20:22:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:22:00,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-27 20:22:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:00,291 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:22:00,291 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:22:00,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:22:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:22:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:22:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:22:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 20:22:00,298 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-27 20:22:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:00,299 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 20:22:00,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:22:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 20:22:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:22:00,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:00,300 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:00,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:22:00,300 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash 127660619, now seen corresponding path program 6 times [2020-10-27 20:22:00,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:00,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309316984] [2020-10-27 20:22:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:00,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:22:00,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 20:22:00,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:22:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:22:00,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:00,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:00,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:00,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:00,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:22:00,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:00,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:00,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:00,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:00,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:00,614 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 20:22:00,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309316984] [2020-10-27 20:22:00,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:00,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:22:00,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690968810] [2020-10-27 20:22:00,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:22:00,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:22:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:22:00,617 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-10-27 20:22:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:01,002 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 20:22:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:22:01,003 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-27 20:22:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:01,003 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:22:01,004 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:22:01,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:22:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:22:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 20:22:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:22:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 20:22:01,011 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-27 20:22:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:01,012 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 20:22:01,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:22:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 20:22:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:22:01,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:01,013 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:01,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:22:01,013 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1202660665, now seen corresponding path program 7 times [2020-10-27 20:22:01,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:01,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787819597] [2020-10-27 20:22:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:01,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:01,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:22:01,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 20:22:01,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:22:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:22:01,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:22:01,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:01,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:01,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:01,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:01,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:22:01,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:01,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:01,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:01,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:01,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787819597] [2020-10-27 20:22:01,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:01,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:22:01,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472724971] [2020-10-27 20:22:01,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:22:01,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:22:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:22:01,429 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2020-10-27 20:22:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:01,849 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 20:22:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:22:01,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-27 20:22:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:01,851 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:22:01,851 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:22:01,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:22:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:22:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 20:22:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:22:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 20:22:01,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-27 20:22:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:01,859 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 20:22:01,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:22:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 20:22:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:22:01,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:01,860 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:01,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:22:01,860 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash 258839619, now seen corresponding path program 8 times [2020-10-27 20:22:01,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:01,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953490205] [2020-10-27 20:22:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:02,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:02,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:22:02,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:02,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-27 20:22:02,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:02,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:22:02,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:02,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:22:02,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:02,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:02,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:02,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:02,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:02,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:02,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:22:02,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:02,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953490205] [2020-10-27 20:22:02,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:02,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:22:02,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856639766] [2020-10-27 20:22:02,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:22:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:22:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:22:02,280 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2020-10-27 20:22:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:02,764 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 20:22:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:22:02,764 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-27 20:22:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:02,766 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:22:02,766 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:22:02,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:22:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:22:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:22:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:22:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 20:22:02,787 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-27 20:22:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:02,788 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 20:22:02,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:22:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 20:22:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:22:02,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:02,789 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:02,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:22:02,789 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash 306306751, now seen corresponding path program 9 times [2020-10-27 20:22:02,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:02,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942488627] [2020-10-27 20:22:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:02,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:03,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:03,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:22:03,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:03,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 20:22:03,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:22:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:22:03,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:03,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:03,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:03,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:03,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:03,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:22:03,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:03,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:03,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:03,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:03,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:03,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942488627] [2020-10-27 20:22:03,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:03,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:22:03,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779908836] [2020-10-27 20:22:03,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:22:03,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:03,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:22:03,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:22:03,247 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2020-10-27 20:22:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:03,742 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 20:22:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:22:03,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-27 20:22:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:03,744 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:22:03,744 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:22:03,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:22:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:22:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 20:22:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:22:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 20:22:03,751 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-27 20:22:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:03,752 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 20:22:03,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:22:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 20:22:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:22:03,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:03,753 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:03,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:22:03,753 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1322419653, now seen corresponding path program 10 times [2020-10-27 20:22:03,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:03,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500713677] [2020-10-27 20:22:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:04,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:04,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:22:04,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:04,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 20:22:04,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:22:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:22:04,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:04,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:04,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:04,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:04,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:04,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:04,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:04,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:04,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:04,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:04,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:04,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:04,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500713677] [2020-10-27 20:22:04,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:04,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:22:04,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95945502] [2020-10-27 20:22:04,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:22:04,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:22:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:22:04,294 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 16 states. [2020-10-27 20:22:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:04,880 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 20:22:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:22:04,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-27 20:22:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:04,882 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:22:04,882 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:22:04,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:22:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:22:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 20:22:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:22:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 20:22:04,891 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-27 20:22:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:04,892 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 20:22:04,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:22:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 20:22:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:22:04,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:04,896 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:04,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:22:04,896 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1134569143, now seen corresponding path program 11 times [2020-10-27 20:22:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:04,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675633745] [2020-10-27 20:22:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:05,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:22:05,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:05,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-27 20:22:05,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:05,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:22:05,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:05,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:22:05,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:05,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:05,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:05,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:05,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:05,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:05,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:05,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675633745] [2020-10-27 20:22:05,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:05,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:22:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387976362] [2020-10-27 20:22:05,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:22:05,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:22:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:22:05,564 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 17 states. [2020-10-27 20:22:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:06,191 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 20:22:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:22:06,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-27 20:22:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:06,193 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:22:06,193 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:22:06,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:22:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:22:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 20:22:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:22:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 20:22:06,201 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-27 20:22:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:06,201 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 20:22:06,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:22:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 20:22:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:22:06,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:06,202 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:06,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:22:06,203 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:06,206 INFO L82 PathProgramCache]: Analyzing trace with hash 68789299, now seen corresponding path program 12 times [2020-10-27 20:22:06,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:06,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587207828] [2020-10-27 20:22:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:06,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:06,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:22:06,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:06,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-27 20:22:06,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:06,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:22:06,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:06,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:22:06,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:06,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:06,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:06,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:06,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:22:06,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:06,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:06,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587207828] [2020-10-27 20:22:06,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:06,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:22:06,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731822958] [2020-10-27 20:22:06,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:22:06,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:22:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:22:06,999 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 18 states. [2020-10-27 20:22:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:07,643 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 20:22:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:22:07,644 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-27 20:22:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:07,645 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:22:07,645 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:22:07,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:22:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:22:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 20:22:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:22:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 20:22:07,653 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-27 20:22:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:07,653 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 20:22:07,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:22:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 20:22:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:22:07,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:07,654 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:07,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:22:07,654 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1943424337, now seen corresponding path program 13 times [2020-10-27 20:22:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:07,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140356004] [2020-10-27 20:22:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:07,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:08,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:08,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:22:08,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-27 20:22:08,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:22:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:22:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:08,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:08,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:08,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:08,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:08,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:08,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:08,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:08,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:08,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:08,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:08,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140356004] [2020-10-27 20:22:08,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:08,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:22:08,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77829284] [2020-10-27 20:22:08,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:22:08,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:08,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:22:08,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:22:08,460 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 19 states. [2020-10-27 20:22:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:09,366 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 20:22:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:22:09,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-10-27 20:22:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:09,368 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:22:09,368 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:22:09,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:22:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:22:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 20:22:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:22:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 20:22:09,384 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-27 20:22:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:09,385 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 20:22:09,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:22:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 20:22:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:22:09,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:09,386 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:09,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:22:09,386 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1349521963, now seen corresponding path program 14 times [2020-10-27 20:22:09,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:09,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954015880] [2020-10-27 20:22:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:09,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:09,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:22:09,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:09,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-27 20:22:09,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:22:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:22:09,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:10,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:10,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:10,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:10,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:10,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954015880] [2020-10-27 20:22:10,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:10,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:22:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634818891] [2020-10-27 20:22:10,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:22:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:22:10,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:22:10,174 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 20 states. [2020-10-27 20:22:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:10,927 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 20:22:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:22:10,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-27 20:22:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:10,928 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:22:10,928 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:22:10,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:22:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:22:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 20:22:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:22:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 20:22:10,943 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-27 20:22:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:10,945 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 20:22:10,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:22:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 20:22:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:22:10,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:10,947 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:10,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:22:10,948 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash 480019111, now seen corresponding path program 15 times [2020-10-27 20:22:10,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:10,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456174559] [2020-10-27 20:22:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:10,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:11,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:11,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:22:11,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:11,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-27 20:22:11,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:11,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:22:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:22:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:11,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:11,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:11,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:11,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:11,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456174559] [2020-10-27 20:22:11,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:11,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:22:11,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156567227] [2020-10-27 20:22:11,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:22:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:22:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:22:11,891 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 21 states. [2020-10-27 20:22:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:12,727 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 20:22:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:22:12,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-27 20:22:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:12,730 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:22:12,730 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:22:12,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:22:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:22:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:22:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:22:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 20:22:12,749 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-27 20:22:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:12,750 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 20:22:12,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:22:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 20:22:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:22:12,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:12,751 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:12,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:22:12,751 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1888566237, now seen corresponding path program 16 times [2020-10-27 20:22:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:12,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627936251] [2020-10-27 20:22:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:12,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:13,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:22:13,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:13,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-27 20:22:13,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:22:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:22:13,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:13,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:13,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:13,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:13,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:22:13,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:13,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627936251] [2020-10-27 20:22:13,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:13,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:22:13,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554137222] [2020-10-27 20:22:13,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:22:13,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:13,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:22:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:22:13,734 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 22 states. [2020-10-27 20:22:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:14,621 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 20:22:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:22:14,621 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-27 20:22:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:14,622 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:22:14,622 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:22:14,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=527, Invalid=1113, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:22:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:22:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:22:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:22:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 20:22:14,644 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-27 20:22:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:14,645 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 20:22:14,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:22:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 20:22:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:22:14,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:14,646 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:14,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:22:14,647 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1766418785, now seen corresponding path program 17 times [2020-10-27 20:22:14,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:14,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272392458] [2020-10-27 20:22:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:14,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:15,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:15,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:22:15,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:15,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-27 20:22:15,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:22:15,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:15,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:22:15,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:15,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:15,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:15,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:15,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:15,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:15,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:15,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:15,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272392458] [2020-10-27 20:22:15,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:15,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:22:15,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219761966] [2020-10-27 20:22:15,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:22:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:22:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:22:15,711 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 23 states. [2020-10-27 20:22:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:16,689 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 20:22:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:22:16,693 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-27 20:22:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:16,693 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:22:16,693 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:22:16,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:22:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:22:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 20:22:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:22:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 20:22:16,701 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-27 20:22:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:16,701 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 20:22:16,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:22:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 20:22:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:22:16,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:16,702 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:16,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:22:16,702 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash -346834405, now seen corresponding path program 18 times [2020-10-27 20:22:16,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:16,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248790177] [2020-10-27 20:22:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:17,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:17,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:22:17,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:17,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-27 20:22:17,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:22:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:22:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:17,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:17,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:17,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:17,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:17,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:17,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:17,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:17,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:17,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:17,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:17,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:17,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248790177] [2020-10-27 20:22:17,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:17,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:22:17,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874113592] [2020-10-27 20:22:17,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:22:17,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:22:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:22:17,741 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 24 states. [2020-10-27 20:22:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:18,825 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 20:22:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:22:18,826 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-27 20:22:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:18,826 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:22:18,827 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:22:18,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:22:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:22:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 20:22:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:22:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 20:22:18,842 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-27 20:22:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:18,842 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 20:22:18,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:22:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 20:22:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:22:18,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:18,843 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:18,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:22:18,843 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1925845353, now seen corresponding path program 19 times [2020-10-27 20:22:18,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:18,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640570971] [2020-10-27 20:22:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:19,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:19,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:22:19,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-27 20:22:19,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:22:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:22:19,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:20,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:20,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:20,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:20,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:20,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:20,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:20,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:20,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640570971] [2020-10-27 20:22:20,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:20,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:22:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272420185] [2020-10-27 20:22:20,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:22:20,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:22:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:22:20,017 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 25 states. [2020-10-27 20:22:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:21,062 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 20:22:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:22:21,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-27 20:22:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:21,064 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:22:21,064 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:22:21,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:22:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:22:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 20:22:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:22:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 20:22:21,071 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-27 20:22:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:21,071 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 20:22:21,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:22:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 20:22:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:22:21,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:21,072 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:21,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:22:21,072 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:21,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1063056403, now seen corresponding path program 20 times [2020-10-27 20:22:21,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:21,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090261964] [2020-10-27 20:22:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:22,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:22:22,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:22,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-27 20:22:22,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:22:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:22:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:22,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:22,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:22,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:22,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:22:22,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:22,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:22,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:22,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:22,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090261964] [2020-10-27 20:22:22,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:22,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:22:22,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381169161] [2020-10-27 20:22:22,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:22:22,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:22:22,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:22:22,503 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 26 states. [2020-10-27 20:22:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:23,695 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 20:22:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:22:23,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-10-27 20:22:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:23,699 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:22:23,699 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:22:23,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=773, Invalid=1579, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:22:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:22:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 20:22:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:22:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 20:22:23,705 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-27 20:22:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:23,706 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 20:22:23,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:22:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 20:22:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:22:23,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:23,707 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:23,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:22:23,707 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:23,707 INFO L82 PathProgramCache]: Analyzing trace with hash 64522895, now seen corresponding path program 21 times [2020-10-27 20:22:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:23,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538335447] [2020-10-27 20:22:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:23,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:24,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:24,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:22:24,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-27 20:22:24,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:22:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 20:22:24,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:25,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:25,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:25,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:25,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:25,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:25,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538335447] [2020-10-27 20:22:25,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:25,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:22:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124467596] [2020-10-27 20:22:25,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:22:25,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:25,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:22:25,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:22:25,159 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 27 states. [2020-10-27 20:22:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:26,448 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 20:22:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:22:26,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-10-27 20:22:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:26,449 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:22:26,449 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:22:26,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=842, Invalid=1708, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:22:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:22:26,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 20:22:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:22:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 20:22:26,456 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-27 20:22:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:26,456 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 20:22:26,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:22:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 20:22:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:22:26,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:26,457 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:26,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:22:26,458 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1748471285, now seen corresponding path program 22 times [2020-10-27 20:22:26,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:26,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926958842] [2020-10-27 20:22:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:27,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:22:27,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:27,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-27 20:22:27,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:22:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 20:22:27,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:27,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:27,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:27,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:27,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:27,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:22:27,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:27,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:27,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926958842] [2020-10-27 20:22:27,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:27,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:22:27,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573730349] [2020-10-27 20:22:27,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:22:27,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:27,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:22:27,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:22:27,907 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 28 states. [2020-10-27 20:22:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:29,247 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 20:22:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:22:29,248 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-10-27 20:22:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:29,249 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:22:29,249 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:22:29,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=914, Invalid=1842, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:22:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:22:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 20:22:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:22:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 20:22:29,255 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-27 20:22:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:29,256 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 20:22:29,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:22:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 20:22:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:22:29,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:29,257 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:29,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:22:29,257 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:29,258 INFO L82 PathProgramCache]: Analyzing trace with hash -279156089, now seen corresponding path program 23 times [2020-10-27 20:22:29,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:29,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460488932] [2020-10-27 20:22:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:29,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:30,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:22:30,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:30,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:30,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460488932] [2020-10-27 20:22:30,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:30,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:22:30,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384522612] [2020-10-27 20:22:30,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:22:30,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:30,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:22:30,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:22:30,836 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 29 states. [2020-10-27 20:22:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:32,148 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 20:22:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:22:32,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-10-27 20:22:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:32,150 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:22:32,150 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:22:32,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=989, Invalid=1981, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:22:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:22:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 20:22:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:22:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 20:22:32,157 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-27 20:22:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:32,158 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 20:22:32,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:22:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 20:22:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:22:32,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:32,159 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:32,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:22:32,159 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1311493117, now seen corresponding path program 24 times [2020-10-27 20:22:32,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:32,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172737489] [2020-10-27 20:22:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:32,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:33,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:33,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:22:33,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:33,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-10-27 20:22:33,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:22:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 20:22:33,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:33,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:33,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:33,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:33,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:33,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:33,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:33,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172737489] [2020-10-27 20:22:33,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:33,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:22:33,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500955175] [2020-10-27 20:22:33,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:22:33,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:33,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:22:33,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:22:33,761 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 30 states. [2020-10-27 20:22:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:35,276 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-27 20:22:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:22:35,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2020-10-27 20:22:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:35,278 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:22:35,278 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:22:35,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1067, Invalid=2125, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:22:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:22:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 20:22:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:22:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-27 20:22:35,285 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-27 20:22:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:35,285 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-27 20:22:35,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:22:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-27 20:22:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:22:35,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:35,286 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:35,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:22:35,286 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1249931649, now seen corresponding path program 25 times [2020-10-27 20:22:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:35,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545867766] [2020-10-27 20:22:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:35,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:36,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 20:22:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:37,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:37,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:37,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:37,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:37,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:37,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:37,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:37,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545867766] [2020-10-27 20:22:37,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:37,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:22:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167049912] [2020-10-27 20:22:37,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:22:37,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:22:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:22:37,084 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 31 states. [2020-10-27 20:22:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:38,603 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-27 20:22:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:22:38,603 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2020-10-27 20:22:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:38,604 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:22:38,604 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:22:38,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1148, Invalid=2274, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:22:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:22:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 20:22:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:22:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-27 20:22:38,611 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-27 20:22:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:38,611 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-27 20:22:38,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:22:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-27 20:22:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:22:38,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:38,612 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:38,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:22:38,612 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2076064251, now seen corresponding path program 26 times [2020-10-27 20:22:38,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:38,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988192242] [2020-10-27 20:22:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:39,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:39,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:22:39,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:39,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1189 [2020-10-27 20:22:39,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:22:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 20:22:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:40,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:40,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:40,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:40,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:40,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:22:40,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:40,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:40,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:40,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:40,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988192242] [2020-10-27 20:22:40,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:40,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:22:40,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754170102] [2020-10-27 20:22:40,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:22:40,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:22:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:22:40,593 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 32 states. [2020-10-27 20:22:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:42,233 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-27 20:22:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:22:42,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-10-27 20:22:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:42,234 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:22:42,234 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:22:42,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1232, Invalid=2428, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:22:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:22:42,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-27 20:22:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 20:22:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-27 20:22:42,242 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-27 20:22:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:42,242 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-27 20:22:42,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:22:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-27 20:22:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:22:42,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:42,243 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:42,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:22:42,243 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1392511369, now seen corresponding path program 27 times [2020-10-27 20:22:42,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:42,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212394218] [2020-10-27 20:22:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:42,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:43,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:43,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:22:43,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:43,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-27 20:22:43,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:22:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 20:22:43,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:44,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:44,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:44,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:44,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:44,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212394218] [2020-10-27 20:22:44,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:44,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:22:44,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977093329] [2020-10-27 20:22:44,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:22:44,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:22:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:22:44,194 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 33 states. [2020-10-27 20:22:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:45,919 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-27 20:22:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:22:45,920 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-10-27 20:22:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:45,921 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:22:45,921 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:22:45,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1319, Invalid=2587, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:22:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:22:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 20:22:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:22:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-27 20:22:45,930 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-27 20:22:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:45,930 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-27 20:22:45,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:22:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-27 20:22:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 20:22:45,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:45,931 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:45,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:22:45,931 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1799060493, now seen corresponding path program 28 times [2020-10-27 20:22:45,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:45,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633569616] [2020-10-27 20:22:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:45,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 20:22:46,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:47,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:47,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:47,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:47,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:47,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:47,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:47,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:47,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:47,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:47,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:47,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633569616] [2020-10-27 20:22:47,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:47,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:22:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96228773] [2020-10-27 20:22:47,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:22:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:22:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:22:47,726 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 34 states. [2020-10-27 20:22:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:49,577 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-27 20:22:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:22:49,578 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 69 [2020-10-27 20:22:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:49,579 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:22:49,579 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:22:49,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:22:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:22:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 20:22:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:22:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-27 20:22:49,589 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-27 20:22:49,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:49,589 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-27 20:22:49,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:22:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-27 20:22:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:22:49,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:49,590 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:49,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:22:49,591 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:49,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1650744721, now seen corresponding path program 29 times [2020-10-27 20:22:49,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:49,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578910079] [2020-10-27 20:22:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:50,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:50,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:22:50,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-27 20:22:50,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:22:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 20:22:50,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:51,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:51,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:51,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:51,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:51,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:51,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:51,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:51,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578910079] [2020-10-27 20:22:51,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:51,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:22:51,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459313251] [2020-10-27 20:22:51,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:22:51,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:51,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:22:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:22:51,402 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 35 states. [2020-10-27 20:22:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:53,391 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-27 20:22:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:22:53,392 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 71 [2020-10-27 20:22:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:53,393 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:22:53,393 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:22:53,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1502, Invalid=2920, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:22:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:22:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 20:22:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:22:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-27 20:22:53,400 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-27 20:22:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:53,400 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-27 20:22:53,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:22:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-27 20:22:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 20:22:53,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:53,401 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:53,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:22:53,402 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash -853208597, now seen corresponding path program 30 times [2020-10-27 20:22:53,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:53,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918331918] [2020-10-27 20:22:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:54,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 20:22:54,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-27 20:22:54,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:22:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 20:22:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:55,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:55,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:55,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:55,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918331918] [2020-10-27 20:22:55,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:55,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:22:55,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545451252] [2020-10-27 20:22:55,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:22:55,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:22:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:22:55,395 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 36 states. [2020-10-27 20:22:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:57,413 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-27 20:22:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:22:57,413 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 73 [2020-10-27 20:22:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:57,414 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:22:57,414 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:22:57,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1598, Invalid=3094, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:22:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:22:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 20:22:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:22:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-27 20:22:57,422 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-27 20:22:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:57,423 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-27 20:22:57,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:22:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-27 20:22:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:22:57,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:57,424 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:57,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:22:57,424 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1074827879, now seen corresponding path program 31 times [2020-10-27 20:22:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881970641] [2020-10-27 20:22:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:57,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 20:22:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:59,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:59,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:59,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:59,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:59,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:59,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:59,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:59,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:59,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:59,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881970641] [2020-10-27 20:22:59,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:59,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:22:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135195745] [2020-10-27 20:22:59,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:22:59,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:59,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:22:59,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:22:59,534 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 37 states. [2020-10-27 20:23:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:01,637 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-27 20:23:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:23:01,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 75 [2020-10-27 20:23:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:01,639 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:23:01,639 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:23:01,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1697, Invalid=3273, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:23:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:23:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 20:23:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:23:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-27 20:23:01,647 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-27 20:23:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:01,647 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-27 20:23:01,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:23:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-27 20:23:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:23:01,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:01,648 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:01,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:23:01,648 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1507990557, now seen corresponding path program 32 times [2020-10-27 20:23:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:01,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575985787] [2020-10-27 20:23:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:01,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:02,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:23:02,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1182 [2020-10-27 20:23:02,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:02,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:23:02,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:02,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 20:23:02,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:03,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:03,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:03,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:03,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:03,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:03,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:03,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:03,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575985787] [2020-10-27 20:23:03,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:03,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:23:03,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280335045] [2020-10-27 20:23:03,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:23:03,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:23:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:23:03,800 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 38 states. [2020-10-27 20:23:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:06,008 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-27 20:23:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:23:06,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2020-10-27 20:23:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:06,010 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:23:06,010 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:23:06,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1799, Invalid=3457, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:23:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:23:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 20:23:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:23:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-27 20:23:06,018 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-27 20:23:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:06,019 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-27 20:23:06,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:23:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-27 20:23:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 20:23:06,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:06,020 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:06,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:23:06,021 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1105410465, now seen corresponding path program 33 times [2020-10-27 20:23:06,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:06,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332030795] [2020-10-27 20:23:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:07,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 20:23:07,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1271 [2020-10-27 20:23:07,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:23:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 20:23:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:08,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:08,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:08,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:08,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:08,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:08,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:08,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:08,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:08,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:08,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:08,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332030795] [2020-10-27 20:23:08,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:08,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:23:08,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981304586] [2020-10-27 20:23:08,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:23:08,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:23:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:23:08,322 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 39 states. [2020-10-27 20:23:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:10,542 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-27 20:23:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:23:10,543 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 79 [2020-10-27 20:23:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:10,544 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:23:10,544 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:23:10,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1904, Invalid=3646, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:23:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:23:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 20:23:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:23:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-27 20:23:10,550 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-27 20:23:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:10,550 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-27 20:23:10,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:23:10,550 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-27 20:23:10,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:23:10,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:10,551 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:10,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:23:10,552 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash -772998693, now seen corresponding path program 34 times [2020-10-27 20:23:10,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:10,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168316983] [2020-10-27 20:23:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:10,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:11,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 20:23:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:13,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:13,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:13,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:13,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:13,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:13,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:13,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:13,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:13,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:13,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168316983] [2020-10-27 20:23:13,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:13,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:23:13,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082799924] [2020-10-27 20:23:13,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:23:13,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:23:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:23:13,105 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 40 states. [2020-10-27 20:23:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:15,497 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-27 20:23:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:23:15,498 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 81 [2020-10-27 20:23:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:15,499 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:23:15,500 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:23:15,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:23:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:23:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 20:23:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 20:23:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-27 20:23:15,507 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-27 20:23:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:15,508 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-27 20:23:15,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:23:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-27 20:23:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 20:23:15,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:15,509 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:15,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:23:15,509 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash 847134295, now seen corresponding path program 35 times [2020-10-27 20:23:15,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:15,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503328811] [2020-10-27 20:23:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:15,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:17,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 20:23:17,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:17,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-27 20:23:17,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:23:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 20:23:17,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:18,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:18,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:18,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:18,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:18,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:23:18,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:18,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:18,195 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 20:23:18,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503328811] [2020-10-27 20:23:18,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:18,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:23:18,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408647494] [2020-10-27 20:23:18,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:23:18,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:23:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:23:18,197 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 41 states. [2020-10-27 20:23:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:20,678 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-27 20:23:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:23:20,678 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 83 [2020-10-27 20:23:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:20,680 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:23:20,680 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:23:20,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2123, Invalid=4039, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:23:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:23:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 20:23:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:23:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-27 20:23:20,688 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-27 20:23:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:20,689 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-27 20:23:20,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:23:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-27 20:23:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 20:23:20,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:20,690 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:20,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:23:20,690 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1278192685, now seen corresponding path program 36 times [2020-10-27 20:23:20,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:20,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632262489] [2020-10-27 20:23:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:22,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:22,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 20:23:22,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:22,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-27 20:23:22,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:23:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 20:23:22,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:23,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:23,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:23,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632262489] [2020-10-27 20:23:23,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:23,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:23:23,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114804306] [2020-10-27 20:23:23,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:23:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:23:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:23:23,521 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 42 states. [2020-10-27 20:23:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:26,180 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-27 20:23:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:23:26,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 85 [2020-10-27 20:23:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:26,182 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:23:26,182 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:23:26,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2237, Invalid=4243, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:23:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:23:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 20:23:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:23:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-27 20:23:26,190 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-27 20:23:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:26,190 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-27 20:23:26,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:23:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-27 20:23:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 20:23:26,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:26,191 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:26,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:23:26,191 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:26,192 INFO L82 PathProgramCache]: Analyzing trace with hash 687012431, now seen corresponding path program 37 times [2020-10-27 20:23:26,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:26,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189374852] [2020-10-27 20:23:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:26,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:27,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:27,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 20:23:27,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1665 [2020-10-27 20:23:27,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:23:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 20:23:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:29,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:29,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:29,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:29,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:29,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189374852] [2020-10-27 20:23:29,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:29,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:23:29,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755373452] [2020-10-27 20:23:29,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:23:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:23:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:23:29,096 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 43 states. [2020-10-27 20:23:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:32,053 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-27 20:23:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:23:32,054 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 87 [2020-10-27 20:23:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:32,055 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:23:32,055 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:23:32,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2354, Invalid=4452, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:23:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:23:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 20:23:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:23:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-10-27 20:23:32,062 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2020-10-27 20:23:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:32,062 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-10-27 20:23:32,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:23:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-10-27 20:23:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 20:23:32,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:32,064 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:32,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:23:32,064 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash -536481333, now seen corresponding path program 38 times [2020-10-27 20:23:32,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:32,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681762106] [2020-10-27 20:23:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2181 [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:35,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:35,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:35,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:35,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681762106] [2020-10-27 20:23:35,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:35,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:23:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099389877] [2020-10-27 20:23:35,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:23:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:23:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:23:35,655 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 44 states. [2020-10-27 20:23:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:38,577 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-27 20:23:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:23:38,578 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 89 [2020-10-27 20:23:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:38,579 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:23:38,579 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:23:38,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2474, Invalid=4666, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:23:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:23:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-27 20:23:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:23:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-27 20:23:38,596 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2020-10-27 20:23:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:38,596 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-27 20:23:38,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:23:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-27 20:23:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 20:23:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:38,598 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:38,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:23:38,601 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash 507050567, now seen corresponding path program 39 times [2020-10-27 20:23:38,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:38,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912298447] [2020-10-27 20:23:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:38,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:40,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2218 [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 20:23:40,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:42,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:42,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:42,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:42,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:42,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:42,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:42,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:42,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912298447] [2020-10-27 20:23:42,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:42,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:23:42,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055877770] [2020-10-27 20:23:42,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:23:42,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:42,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:23:42,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:23:42,286 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 45 states. [2020-10-27 20:23:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:45,509 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-27 20:23:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:23:45,510 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 91 [2020-10-27 20:23:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:45,511 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:23:45,511 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:23:45,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2597, Invalid=4885, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 20:23:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:23:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 20:23:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:23:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-27 20:23:45,519 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-27 20:23:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:45,520 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-27 20:23:45,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:23:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-27 20:23:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 20:23:45,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:45,535 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:45,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:23:45,536 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1681140797, now seen corresponding path program 40 times [2020-10-27 20:23:45,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:45,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154718750] [2020-10-27 20:23:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:45,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:47,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 20:23:47,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2076 [2020-10-27 20:23:47,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:23:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 20:23:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:49,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:49,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:49,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154718750] [2020-10-27 20:23:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:49,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:23:49,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064159686] [2020-10-27 20:23:49,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:23:49,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:49,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:23:49,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:23:49,146 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 46 states. [2020-10-27 20:23:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:52,394 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-27 20:23:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:23:52,394 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 93 [2020-10-27 20:23:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:52,395 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:23:52,395 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:23:52,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2723, Invalid=5109, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 20:23:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:23:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 20:23:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:23:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-27 20:23:52,404 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-27 20:23:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:52,405 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-27 20:23:52,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:23:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-27 20:23:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 20:23:52,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:52,406 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:52,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:23:52,406 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash 933439, now seen corresponding path program 41 times [2020-10-27 20:23:52,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:52,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287158727] [2020-10-27 20:23:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:52,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2328 [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 20:23:54,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:56,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:56,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:56,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:56,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:23:56,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:56,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:56,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:56,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:56,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:56,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287158727] [2020-10-27 20:23:56,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:56,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:23:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942932029] [2020-10-27 20:23:56,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:23:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:23:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:23:56,289 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 47 states. [2020-10-27 20:23:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:59,622 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-27 20:23:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:23:59,623 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 95 [2020-10-27 20:23:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:59,624 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:23:59,624 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:23:59,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2852, Invalid=5338, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 20:23:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:23:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 20:23:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:23:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-27 20:23:59,632 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-27 20:23:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:59,633 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-27 20:23:59,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:23:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-27 20:23:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 20:23:59,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:59,636 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:59,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:23:59,636 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1566570939, now seen corresponding path program 42 times [2020-10-27 20:23:59,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:59,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143446374] [2020-10-27 20:23:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:02,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:02,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 20:24:02,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2495 [2020-10-27 20:24:02,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:24:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 20:24:02,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:03,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:03,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:03,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143446374] [2020-10-27 20:24:03,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:03,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:24:03,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938892000] [2020-10-27 20:24:03,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:24:03,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:03,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:24:03,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:24:03,773 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 48 states. [2020-10-27 20:24:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:07,224 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-27 20:24:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:24:07,224 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 97 [2020-10-27 20:24:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:07,226 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:24:07,226 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:24:07,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2984, Invalid=5572, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 20:24:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:24:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 20:24:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:24:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-27 20:24:07,233 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-27 20:24:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:07,233 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-27 20:24:07,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:24:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-27 20:24:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 20:24:07,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:07,234 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:07,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:24:07,234 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1389312457, now seen corresponding path program 43 times [2020-10-27 20:24:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:07,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112927954] [2020-10-27 20:24:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:07,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:09,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 20:24:09,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:09,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2234 [2020-10-27 20:24:09,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:09,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:24:09,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:09,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 20:24:09,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:11,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:11,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:11,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:11,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112927954] [2020-10-27 20:24:11,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:11,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:24:11,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106251190] [2020-10-27 20:24:11,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:24:11,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:24:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:24:11,197 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 49 states. [2020-10-27 20:24:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:14,796 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-27 20:24:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:24:14,796 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 99 [2020-10-27 20:24:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:14,798 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:24:14,798 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:24:14,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3119, Invalid=5811, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:24:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:24:14,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 20:24:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:24:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-10-27 20:24:14,806 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2020-10-27 20:24:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:14,806 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-10-27 20:24:14,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:24:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-10-27 20:24:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:24:14,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:14,807 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:14,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:24:14,808 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:14,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1275093939, now seen corresponding path program 44 times [2020-10-27 20:24:14,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:14,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136565092] [2020-10-27 20:24:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:17,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2875 [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 20:24:17,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:19,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:19,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:19,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:19,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:19,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:19,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:19,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:19,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136565092] [2020-10-27 20:24:19,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:19,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:24:19,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365439241] [2020-10-27 20:24:19,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:24:19,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:19,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:24:19,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:24:19,418 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 50 states. [2020-10-27 20:24:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:23,287 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-27 20:24:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:24:23,288 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 101 [2020-10-27 20:24:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:23,290 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:24:23,290 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:24:23,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3257, Invalid=6055, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 20:24:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:24:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 20:24:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:24:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-27 20:24:23,298 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2020-10-27 20:24:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:23,298 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-27 20:24:23,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:24:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-27 20:24:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 20:24:23,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:23,299 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:23,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:24:23,299 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1969132079, now seen corresponding path program 45 times [2020-10-27 20:24:23,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:23,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111155571] [2020-10-27 20:24:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:23,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:26,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:26,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 20:24:26,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:26,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2714 [2020-10-27 20:24:26,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:24:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 20:24:26,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:27,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:27,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:27,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:27,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:27,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:27,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:27,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:27,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:27,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:27,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:27,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111155571] [2020-10-27 20:24:27,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:27,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:24:27,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469102363] [2020-10-27 20:24:27,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:24:27,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:24:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:24:27,877 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 51 states. [2020-10-27 20:24:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:31,747 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-27 20:24:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:24:31,748 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 103 [2020-10-27 20:24:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:31,749 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:24:31,750 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:24:31,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3398, Invalid=6304, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 20:24:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:24:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 20:24:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:24:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-27 20:24:31,758 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2020-10-27 20:24:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:31,758 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-27 20:24:31,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:24:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-27 20:24:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 20:24:31,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:31,759 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:31,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:24:31,760 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:31,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1075113557, now seen corresponding path program 46 times [2020-10-27 20:24:31,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:31,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385154807] [2020-10-27 20:24:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:34,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:34,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 20:24:34,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2711 [2020-10-27 20:24:34,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:24:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 20:24:34,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:36,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:36,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:36,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385154807] [2020-10-27 20:24:36,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:36,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:24:36,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672825713] [2020-10-27 20:24:36,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:24:36,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:36,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:24:36,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:24:36,417 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 52 states. [2020-10-27 20:24:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:40,442 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 20:24:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:24:40,443 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 105 [2020-10-27 20:24:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:40,444 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:24:40,445 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:24:40,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3542, Invalid=6558, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:24:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:24:40,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 20:24:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 20:24:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-27 20:24:40,453 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2020-10-27 20:24:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:40,454 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-27 20:24:40,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:24:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-27 20:24:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:24:40,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:40,455 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:40,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:24:40,455 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1722441177, now seen corresponding path program 47 times [2020-10-27 20:24:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:40,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186220443] [2020-10-27 20:24:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:40,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3026 [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 20:24:43,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:45,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:45,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:45,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:45,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:45,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:45,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:45,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:45,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186220443] [2020-10-27 20:24:45,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:45,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:24:45,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730089699] [2020-10-27 20:24:45,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:24:45,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:45,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:24:45,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:24:45,516 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 53 states. [2020-10-27 20:24:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:49,762 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-27 20:24:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:24:49,763 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 107 [2020-10-27 20:24:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:49,764 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:24:49,764 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:24:49,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3689, Invalid=6817, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:24:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:24:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 20:24:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:24:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-10-27 20:24:49,771 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2020-10-27 20:24:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:49,772 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-10-27 20:24:49,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:24:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-10-27 20:24:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 20:24:49,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:49,773 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:49,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:24:49,773 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1034026077, now seen corresponding path program 48 times [2020-10-27 20:24:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:49,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699455707] [2020-10-27 20:24:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:49,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:52,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:52,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 20:24:52,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:52,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3025 [2020-10-27 20:24:52,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:52,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:24:52,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:52,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 20:24:52,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:54,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:54,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:54,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:54,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:54,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:54,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:54,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:54,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:54,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:54,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:54,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:54,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699455707] [2020-10-27 20:24:54,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:54,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 20:24:54,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070669971] [2020-10-27 20:24:54,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 20:24:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 20:24:54,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:24:54,920 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 54 states. [2020-10-27 20:24:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:59,051 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-27 20:24:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 20:24:59,052 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 109 [2020-10-27 20:24:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:59,053 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:24:59,053 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:24:59,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3839, Invalid=7081, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 20:24:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:24:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 20:24:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:24:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-10-27 20:24:59,062 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2020-10-27 20:24:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:59,063 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-10-27 20:24:59,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 20:24:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-10-27 20:24:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:24:59,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:59,064 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:59,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:24:59,064 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -892078561, now seen corresponding path program 49 times [2020-10-27 20:24:59,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:59,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355429556] [2020-10-27 20:24:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3155 [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 20:25:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:04,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:04,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:04,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:04,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355429556] [2020-10-27 20:25:04,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:04,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 20:25:04,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790019788] [2020-10-27 20:25:04,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 20:25:04,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 20:25:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1638, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:25:04,336 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 55 states. [2020-10-27 20:25:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:08,745 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-27 20:25:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:25:08,746 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 111 [2020-10-27 20:25:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:08,748 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:25:08,748 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:25:08,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3992, Invalid=7350, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 20:25:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:25:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 20:25:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:25:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2020-10-27 20:25:08,758 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2020-10-27 20:25:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:08,758 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2020-10-27 20:25:08,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 20:25:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2020-10-27 20:25:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 20:25:08,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:08,759 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:08,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:25:08,760 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1919469157, now seen corresponding path program 50 times [2020-10-27 20:25:08,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:08,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409968853] [2020-10-27 20:25:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:08,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3387 [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 20:25:12,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:14,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:14,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:14,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:14,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:14,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:14,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:14,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:14,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409968853] [2020-10-27 20:25:14,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:14,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 20:25:14,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764326742] [2020-10-27 20:25:14,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 20:25:14,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 20:25:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:25:14,513 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 56 states. [2020-10-27 20:25:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:19,133 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-27 20:25:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 20:25:19,134 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 113 [2020-10-27 20:25:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:19,136 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:25:19,136 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:25:19,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4148, Invalid=7624, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 20:25:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:25:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 20:25:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 20:25:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-27 20:25:19,143 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2020-10-27 20:25:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:19,143 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-27 20:25:19,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 20:25:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-27 20:25:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 20:25:19,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:19,144 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:19,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:25:19,145 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1399353833, now seen corresponding path program 51 times [2020-10-27 20:25:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:19,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103577130] [2020-10-27 20:25:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:23,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:23,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 20:25:23,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:23,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4112 [2020-10-27 20:25:23,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 20:25:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 20:25:23,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:25,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:25,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:25,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:25,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:25,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:25,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:25,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:25,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:25,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103577130] [2020-10-27 20:25:25,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:25,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 20:25:25,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258190904] [2020-10-27 20:25:25,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 20:25:25,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 20:25:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:25:25,581 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 57 states. [2020-10-27 20:25:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:30,270 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-27 20:25:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 20:25:30,271 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 115 [2020-10-27 20:25:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:30,272 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:25:30,273 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:25:30,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4307, Invalid=7903, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 20:25:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:25:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 20:25:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:25:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-27 20:25:30,293 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2020-10-27 20:25:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:30,294 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-27 20:25:30,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 20:25:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-27 20:25:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 20:25:30,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:30,295 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:30,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:25:30,295 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash 215266195, now seen corresponding path program 52 times [2020-10-27 20:25:30,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:30,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295494356] [2020-10-27 20:25:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:30,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:34,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3703 [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 20:25:34,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:36,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:36,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:36,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:36,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:36,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:36,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:36,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:36,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295494356] [2020-10-27 20:25:36,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:36,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 20:25:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11829564] [2020-10-27 20:25:36,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 20:25:36,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:36,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 20:25:36,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=1815, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:25:36,517 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 58 states. [2020-10-27 20:25:41,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:41,479 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-27 20:25:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 20:25:41,481 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 117 [2020-10-27 20:25:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:41,482 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:25:41,482 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:25:41,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4469, Invalid=8187, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 20:25:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:25:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 20:25:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 20:25:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-10-27 20:25:41,489 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2020-10-27 20:25:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:41,489 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-10-27 20:25:41,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 20:25:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-10-27 20:25:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 20:25:41,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:41,490 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:41,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:25:41,490 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1381919247, now seen corresponding path program 53 times [2020-10-27 20:25:41,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:41,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515174250] [2020-10-27 20:25:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking...