/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:33,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:33,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:33,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:33,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:33,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:33,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:33,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:33,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:33,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:33,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:33,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:33,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:33,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:33,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:33,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:33,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:33,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:33,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:33,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:33,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:33,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:33,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:33,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:33,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:33,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:33,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:33,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:33,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:33,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:33,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:33,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:33,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:33,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:33,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:33,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:33,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:33,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:33,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:33,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:33,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:33,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:25:33,536 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:33,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:33,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:33,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:33,542 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:33,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:33,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:33,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:33,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:33,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:33,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:33,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:33,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:33,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:33,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:33,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:33,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:33,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:33,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:33,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:33,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:33,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:33,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:33,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:33,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:33,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:33,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:33,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:33,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:33,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:34,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:34,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:34,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:34,093 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:34,094 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:34,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2020-10-26 19:25:34,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/247d4bdda/322dba7378e4457c882bdcb00d8e8cbd/FLAG9247ed878 [2020-10-26 19:25:34,908 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:34,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2020-10-26 19:25:34,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/247d4bdda/322dba7378e4457c882bdcb00d8e8cbd/FLAG9247ed878 [2020-10-26 19:25:35,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/247d4bdda/322dba7378e4457c882bdcb00d8e8cbd [2020-10-26 19:25:35,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:35,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:35,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:35,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:35,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:35,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc1cecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35, skipping insertion in model container [2020-10-26 19:25:35,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:35,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:35,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:35,531 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:35,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:35,582 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:35,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35 WrapperNode [2020-10-26 19:25:35,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:35,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:35,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:35,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:35,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... [2020-10-26 19:25:35,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:35,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:35,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:35,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:35,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:35,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:35,722 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:36,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:36,101 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-26 19:25:36,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:36 BoogieIcfgContainer [2020-10-26 19:25:36,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:36,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:36,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:36,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:36,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:35" (1/3) ... [2020-10-26 19:25:36,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e35ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:36, skipping insertion in model container [2020-10-26 19:25:36,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:35" (2/3) ... [2020-10-26 19:25:36,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e35ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:36, skipping insertion in model container [2020-10-26 19:25:36,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:36" (3/3) ... [2020-10-26 19:25:36,138 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2020-10-26 19:25:36,161 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:36,167 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:36,182 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:36,214 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:36,215 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:36,215 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:36,215 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:36,215 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:36,215 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:36,215 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:36,215 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-26 19:25:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:25:36,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:36,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:36,270 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:36,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1772990658, now seen corresponding path program 1 times [2020-10-26 19:25:36,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:36,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699647476] [2020-10-26 19:25:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:37,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:39,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:39,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:25:39,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:25:39,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2954 [2020-10-26 19:25:39,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:39,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:39,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:39,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:39,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:25:39,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:39,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:39,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:39,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:39,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:39,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:25:39,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:39,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:39,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:39,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699647476] [2020-10-26 19:25:39,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939705149] [2020-10-26 19:25:39,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:39,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:39,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:39,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:39,700 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-10-26 19:25:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:39,923 INFO L93 Difference]: Finished difference Result 82 states and 136 transitions. [2020-10-26 19:25:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:39,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 19:25:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:39,934 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:25:39,934 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:25:39,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:25:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:25:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:25:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-26 19:25:39,988 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 29 [2020-10-26 19:25:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:39,989 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-26 19:25:39,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-26 19:25:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:25:39,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:39,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:39,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:39,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:39,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1440650294, now seen corresponding path program 1 times [2020-10-26 19:25:39,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:39,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433368923] [2020-10-26 19:25:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:45,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:25:45,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:25:45,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:25:45,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:45,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:45,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:45,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:25:45,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:45,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:45,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:45,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:45,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:45,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:25:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:25:45,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433368923] [2020-10-26 19:25:45,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:45,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818684249] [2020-10-26 19:25:45,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:45,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:45,144 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2020-10-26 19:25:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:45,392 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-10-26 19:25:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:45,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-26 19:25:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:45,394 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:25:45,395 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:25:45,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:25:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 19:25:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:25:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-26 19:25:45,410 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 37 [2020-10-26 19:25:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:45,411 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-26 19:25:45,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-26 19:25:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:25:45,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:45,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:45,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:45,413 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1729417274, now seen corresponding path program 2 times [2020-10-26 19:25:45,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:45,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013257772] [2020-10-26 19:25:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:45,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:50,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:50,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:25:50,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:50,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:25:50,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:50,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:50,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:50,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:50,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:50,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:50,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:25:50,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013257772] [2020-10-26 19:25:50,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:50,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:50,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234369399] [2020-10-26 19:25:50,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:50,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:50,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:50,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:50,574 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 6 states. [2020-10-26 19:25:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:50,781 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-10-26 19:25:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:50,781 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-26 19:25:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:50,783 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:25:50,783 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:25:50,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:25:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 19:25:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:25:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-26 19:25:50,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2020-10-26 19:25:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:50,796 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-26 19:25:50,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-26 19:25:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:25:50,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:50,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:50,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:50,798 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:50,799 INFO L82 PathProgramCache]: Analyzing trace with hash 620300470, now seen corresponding path program 3 times [2020-10-26 19:25:50,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:50,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85543285] [2020-10-26 19:25:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:50,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:50,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:50,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:51,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:55,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:25:55,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:55,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:25:55,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:55,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:55,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:55,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:55,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:55,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:55,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:55,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:55,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:55,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:25:55,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:55,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:55,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:25:55,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85543285] [2020-10-26 19:25:55,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:55,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:55,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936128315] [2020-10-26 19:25:55,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:55,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:55,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:55,937 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 7 states. [2020-10-26 19:25:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:56,195 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-10-26 19:25:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:56,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-26 19:25:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:56,197 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:25:56,198 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:25:56,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:25:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:25:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:25:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-26 19:25:56,220 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 53 [2020-10-26 19:25:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:56,222 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-26 19:25:56,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-26 19:25:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:25:56,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:56,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:56,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:56,225 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1183117498, now seen corresponding path program 4 times [2020-10-26 19:25:56,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:56,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53099413] [2020-10-26 19:25:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:56,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:56,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:56,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:01,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:26:01,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:26:01,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:01,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:26:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:01,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:26:01,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:01,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:01,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:01,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:01,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:01,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:01,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:01,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:01,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:01,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:26:01,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53099413] [2020-10-26 19:26:01,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:01,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:26:01,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989786625] [2020-10-26 19:26:01,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:26:01,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:26:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:26:01,386 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 8 states. [2020-10-26 19:26:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:01,611 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-10-26 19:26:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:26:01,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-26 19:26:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:01,613 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:26:01,613 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:26:01,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:26:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:26:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-26 19:26:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:26:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-26 19:26:01,634 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 61 [2020-10-26 19:26:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:01,634 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-26 19:26:01,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:26:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-26 19:26:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:26:01,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:01,638 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:01,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:26:01,639 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash -608395978, now seen corresponding path program 5 times [2020-10-26 19:26:01,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:01,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538957695] [2020-10-26 19:26:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:01,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:06,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:26:06,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:06,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:26:06,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:26:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:06,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:26:06,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:06,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:06,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:06,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:06,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:06,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:06,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:26:06,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538957695] [2020-10-26 19:26:06,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:06,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:26:06,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816717012] [2020-10-26 19:26:06,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:26:06,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:06,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:26:06,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:06,858 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 9 states. [2020-10-26 19:26:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:07,090 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-26 19:26:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:26:07,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-26 19:26:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:07,092 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:26:07,092 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:26:07,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:26:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:26:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:26:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-26 19:26:07,117 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 69 [2020-10-26 19:26:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:07,117 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-26 19:26:07,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:26:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-26 19:26:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:26:07,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:07,119 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:07,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:26:07,122 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:07,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1558671674, now seen corresponding path program 6 times [2020-10-26 19:26:07,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:07,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53946098] [2020-10-26 19:26:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:07,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:12,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:26:12,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:12,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:12,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:12,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:26:12,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:12,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:26:12,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:12,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:12,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:12,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:12,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:12,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:12,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:12,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:26:12,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53946098] [2020-10-26 19:26:12,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:12,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:26:12,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053303657] [2020-10-26 19:26:12,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:26:12,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:26:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:12,316 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 10 states. [2020-10-26 19:26:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:12,544 INFO L93 Difference]: Finished difference Result 159 states and 182 transitions. [2020-10-26 19:26:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:26:12,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-26 19:26:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:12,545 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:26:12,545 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:26:12,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:26:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-26 19:26:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:26:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-10-26 19:26:12,564 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 77 [2020-10-26 19:26:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:12,565 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-10-26 19:26:12,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:26:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-10-26 19:26:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:26:12,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:12,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:12,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:26:12,570 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:12,570 INFO L82 PathProgramCache]: Analyzing trace with hash -909553226, now seen corresponding path program 7 times [2020-10-26 19:26:12,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:12,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658881234] [2020-10-26 19:26:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:26:17,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:17,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:26:17,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:17,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:26:17,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:17,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:17,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:26:17,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:17,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-26 19:26:17,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658881234] [2020-10-26 19:26:17,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:17,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:26:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404817257] [2020-10-26 19:26:17,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:26:17,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:26:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:17,786 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 11 states. [2020-10-26 19:26:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:18,035 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2020-10-26 19:26:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:18,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-26 19:26:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:18,037 INFO L225 Difference]: With dead ends: 174 [2020-10-26 19:26:18,037 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:26:18,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:26:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-26 19:26:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:26:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2020-10-26 19:26:18,063 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 85 [2020-10-26 19:26:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:18,063 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2020-10-26 19:26:18,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2020-10-26 19:26:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:26:18,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:18,068 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:18,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:18,068 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 119296442, now seen corresponding path program 8 times [2020-10-26 19:26:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:18,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234636992] [2020-10-26 19:26:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:23,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:26:23,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:23,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:26:23,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:23,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:23,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:23,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:23,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:23,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:23,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:23,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:23,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:23,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:23,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:23,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-26 19:26:23,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234636992] [2020-10-26 19:26:23,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:23,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:23,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192541244] [2020-10-26 19:26:23,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:23,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:23,244 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand 12 states. [2020-10-26 19:26:23,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:23,575 INFO L93 Difference]: Finished difference Result 189 states and 212 transitions. [2020-10-26 19:26:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:23,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2020-10-26 19:26:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:23,577 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:26:23,577 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:26:23,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:26:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-26 19:26:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:26:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-10-26 19:26:23,588 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 93 [2020-10-26 19:26:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:23,589 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-10-26 19:26:23,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-10-26 19:26:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:26:23,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:23,591 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:23,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:23,591 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:23,592 INFO L82 PathProgramCache]: Analyzing trace with hash -591452618, now seen corresponding path program 9 times [2020-10-26 19:26:23,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:23,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073427945] [2020-10-26 19:26:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:23,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:26:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:28,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:28,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:28,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:28,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:28,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:28,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:28,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:28,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:28,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:28,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-26 19:26:28,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073427945] [2020-10-26 19:26:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:28,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394220795] [2020-10-26 19:26:28,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:28,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:28,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:28,781 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 13 states. [2020-10-26 19:26:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:29,054 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2020-10-26 19:26:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:29,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-26 19:26:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:29,055 INFO L225 Difference]: With dead ends: 204 [2020-10-26 19:26:29,055 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:26:29,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:26:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-26 19:26:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:26:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2020-10-26 19:26:29,064 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 101 [2020-10-26 19:26:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:29,064 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2020-10-26 19:26:29,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2020-10-26 19:26:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:26:29,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:29,066 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:29,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:29,066 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:29,067 INFO L82 PathProgramCache]: Analyzing trace with hash 604213818, now seen corresponding path program 10 times [2020-10-26 19:26:29,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:29,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151083490] [2020-10-26 19:26:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:29,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:34,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:26:34,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:34,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:26:34,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:34,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:34,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:34,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:34,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:34,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:34,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:34,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:34,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:34,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:34,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:34,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-26 19:26:34,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151083490] [2020-10-26 19:26:34,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:34,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:34,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653897597] [2020-10-26 19:26:34,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:34,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:34,276 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand 14 states. [2020-10-26 19:26:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:34,558 INFO L93 Difference]: Finished difference Result 219 states and 242 transitions. [2020-10-26 19:26:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:34,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 109 [2020-10-26 19:26:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:34,559 INFO L225 Difference]: With dead ends: 219 [2020-10-26 19:26:34,559 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:26:34,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:26:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-26 19:26:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:26:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2020-10-26 19:26:34,568 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 109 [2020-10-26 19:26:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:34,568 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2020-10-26 19:26:34,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2020-10-26 19:26:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:26:34,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:34,570 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:34,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:34,570 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1606542666, now seen corresponding path program 11 times [2020-10-26 19:26:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:34,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467984633] [2020-10-26 19:26:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:38,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:39,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:26:39,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:39,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:26:39,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:26:39,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:39,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:39,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:39,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:39,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:39,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:39,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:39,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:39,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:39,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:39,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-26 19:26:39,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467984633] [2020-10-26 19:26:39,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:39,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:39,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227971422] [2020-10-26 19:26:39,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:39,794 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand 15 states. [2020-10-26 19:26:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:40,122 INFO L93 Difference]: Finished difference Result 234 states and 257 transitions. [2020-10-26 19:26:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:40,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-10-26 19:26:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:40,124 INFO L225 Difference]: With dead ends: 234 [2020-10-26 19:26:40,125 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:26:40,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:26:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-26 19:26:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:26:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-10-26 19:26:40,133 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 117 [2020-10-26 19:26:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:40,134 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-10-26 19:26:40,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-10-26 19:26:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:26:40,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:40,135 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:40,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:40,136 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash 343749306, now seen corresponding path program 12 times [2020-10-26 19:26:40,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:40,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916689493] [2020-10-26 19:26:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:40,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:45,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:45,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:26:45,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:45,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:45,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:45,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:45,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:45,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:45,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:45,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:45,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:45,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:45,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:45,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:45,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:45,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:45,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:45,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:45,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:45,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-26 19:26:45,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916689493] [2020-10-26 19:26:45,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:45,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:45,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526182217] [2020-10-26 19:26:45,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:45,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:45,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:45,387 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 16 states. [2020-10-26 19:26:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:45,756 INFO L93 Difference]: Finished difference Result 249 states and 272 transitions. [2020-10-26 19:26:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:45,756 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2020-10-26 19:26:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:45,757 INFO L225 Difference]: With dead ends: 249 [2020-10-26 19:26:45,758 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:26:45,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:26:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-26 19:26:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:26:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2020-10-26 19:26:45,769 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 125 [2020-10-26 19:26:45,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:45,772 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2020-10-26 19:26:45,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2020-10-26 19:26:45,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:26:45,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:45,774 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:45,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:45,774 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:45,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1038495542, now seen corresponding path program 13 times [2020-10-26 19:26:45,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:45,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438612043] [2020-10-26 19:26:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:45,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:45,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:46,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:50,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:26:50,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:50,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:50,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:50,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:51,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:51,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:51,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:51,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:51,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:51,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:26:51,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2020-10-26 19:26:51,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438612043] [2020-10-26 19:26:51,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:51,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:51,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145298330] [2020-10-26 19:26:51,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:51,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:51,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:51,044 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 17 states. [2020-10-26 19:26:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:51,351 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2020-10-26 19:26:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:51,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-10-26 19:26:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:51,353 INFO L225 Difference]: With dead ends: 264 [2020-10-26 19:26:51,354 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:26:51,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:26:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-26 19:26:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:26:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2020-10-26 19:26:51,369 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 133 [2020-10-26 19:26:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:51,371 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2020-10-26 19:26:51,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2020-10-26 19:26:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 19:26:51,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:51,374 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:51,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:51,374 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1150733510, now seen corresponding path program 14 times [2020-10-26 19:26:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:51,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744975886] [2020-10-26 19:26:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:51,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:51,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:51,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:56,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 19:26:56,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:56,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:26:56,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:56,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:56,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:56,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:56,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:56,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:56,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2020-10-26 19:26:56,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744975886] [2020-10-26 19:26:56,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:56,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:56,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714168448] [2020-10-26 19:26:56,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:56,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:56,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:56,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:56,674 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand 18 states. [2020-10-26 19:26:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:57,105 INFO L93 Difference]: Finished difference Result 279 states and 302 transitions. [2020-10-26 19:26:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:57,106 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-10-26 19:26:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:57,107 INFO L225 Difference]: With dead ends: 279 [2020-10-26 19:26:57,107 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:26:57,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:26:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-26 19:26:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:26:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2020-10-26 19:26:57,124 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 141 [2020-10-26 19:26:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:57,124 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2020-10-26 19:26:57,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2020-10-26 19:26:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-26 19:26:57,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:57,128 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:57,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:57,128 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2102879158, now seen corresponding path program 15 times [2020-10-26 19:26:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:57,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544434169] [2020-10-26 19:26:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:57,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:57,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:57,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:57,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:27:02,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:02,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:02,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:02,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:02,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:02,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:02,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:02,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-26 19:27:02,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544434169] [2020-10-26 19:27:02,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:02,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:27:02,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096421765] [2020-10-26 19:27:02,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:27:02,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:02,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:27:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:27:02,448 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand 19 states. [2020-10-26 19:27:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:02,832 INFO L93 Difference]: Finished difference Result 294 states and 317 transitions. [2020-10-26 19:27:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:27:02,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 149 [2020-10-26 19:27:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:02,834 INFO L225 Difference]: With dead ends: 294 [2020-10-26 19:27:02,834 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:27:02,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:27:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:27:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-26 19:27:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:27:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 170 transitions. [2020-10-26 19:27:02,849 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 170 transitions. Word has length 149 [2020-10-26 19:27:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:02,849 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 170 transitions. [2020-10-26 19:27:02,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:27:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 170 transitions. [2020-10-26 19:27:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:27:02,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:02,851 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:02,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:27:02,852 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2108134330, now seen corresponding path program 16 times [2020-10-26 19:27:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:02,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493894443] [2020-10-26 19:27:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:03,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:03,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:27:07,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:08,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:08,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:08,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:08,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:08,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:08,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:08,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2020-10-26 19:27:08,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493894443] [2020-10-26 19:27:08,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:08,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:27:08,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879272713] [2020-10-26 19:27:08,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:27:08,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:27:08,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:27:08,221 INFO L87 Difference]: Start difference. First operand 162 states and 170 transitions. Second operand 20 states. [2020-10-26 19:27:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:08,706 INFO L93 Difference]: Finished difference Result 309 states and 332 transitions. [2020-10-26 19:27:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:27:08,707 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 157 [2020-10-26 19:27:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:08,709 INFO L225 Difference]: With dead ends: 309 [2020-10-26 19:27:08,709 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:27:08,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:27:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:27:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-26 19:27:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:27:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-10-26 19:27:08,721 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 157 [2020-10-26 19:27:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:08,721 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-10-26 19:27:08,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:27:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-10-26 19:27:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-26 19:27:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:08,724 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:08,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:27:08,725 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1003374538, now seen corresponding path program 17 times [2020-10-26 19:27:08,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:08,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729404395] [2020-10-26 19:27:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:08,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:13,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:13,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 19:27:13,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:13,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:27:13,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:13,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:27:13,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:13,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:27:13,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:14,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:14,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:14,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-26 19:27:14,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729404395] [2020-10-26 19:27:14,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:14,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:27:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156602912] [2020-10-26 19:27:14,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:27:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:14,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:27:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:14,075 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 21 states. [2020-10-26 19:27:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:14,556 INFO L93 Difference]: Finished difference Result 324 states and 347 transitions. [2020-10-26 19:27:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:27:14,556 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 165 [2020-10-26 19:27:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:14,557 INFO L225 Difference]: With dead ends: 324 [2020-10-26 19:27:14,558 INFO L226 Difference]: Without dead ends: 178 [2020-10-26 19:27:14,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-26 19:27:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-26 19:27:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:27:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 186 transitions. [2020-10-26 19:27:14,568 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 186 transitions. Word has length 165 [2020-10-26 19:27:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:14,569 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 186 transitions. [2020-10-26 19:27:14,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:27:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 186 transitions. [2020-10-26 19:27:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 19:27:14,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:14,571 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:14,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:27:14,572 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1108890682, now seen corresponding path program 18 times [2020-10-26 19:27:14,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:14,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479431289] [2020-10-26 19:27:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:14,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:19,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:27:19,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:19,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:27:19,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:27:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:27:19,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:19,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:19,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:19,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2020-10-26 19:27:19,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479431289] [2020-10-26 19:27:19,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:19,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:27:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672790402] [2020-10-26 19:27:19,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:27:19,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:27:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:19,962 INFO L87 Difference]: Start difference. First operand 178 states and 186 transitions. Second operand 22 states. [2020-10-26 19:27:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:20,467 INFO L93 Difference]: Finished difference Result 339 states and 362 transitions. [2020-10-26 19:27:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:27:20,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 173 [2020-10-26 19:27:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:20,470 INFO L225 Difference]: With dead ends: 339 [2020-10-26 19:27:20,470 INFO L226 Difference]: Without dead ends: 186 [2020-10-26 19:27:20,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-26 19:27:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-26 19:27:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-26 19:27:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 194 transitions. [2020-10-26 19:27:20,482 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 194 transitions. Word has length 173 [2020-10-26 19:27:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:20,483 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 194 transitions. [2020-10-26 19:27:20,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:27:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 194 transitions. [2020-10-26 19:27:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 19:27:20,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:20,485 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:20,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:27:20,485 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:20,486 INFO L82 PathProgramCache]: Analyzing trace with hash 370486454, now seen corresponding path program 19 times [2020-10-26 19:27:20,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:20,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355087122] [2020-10-26 19:27:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:25,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:25,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 19:27:25,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:25,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:27:25,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:25,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:27:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:27:25,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:25,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:25,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2020-10-26 19:27:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355087122] [2020-10-26 19:27:25,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:25,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:27:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94239843] [2020-10-26 19:27:25,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:27:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:27:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:25,914 INFO L87 Difference]: Start difference. First operand 186 states and 194 transitions. Second operand 23 states. [2020-10-26 19:27:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:26,449 INFO L93 Difference]: Finished difference Result 354 states and 377 transitions. [2020-10-26 19:27:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:27:26,450 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 181 [2020-10-26 19:27:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:26,451 INFO L225 Difference]: With dead ends: 354 [2020-10-26 19:27:26,451 INFO L226 Difference]: Without dead ends: 194 [2020-10-26 19:27:26,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-26 19:27:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-10-26 19:27:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-26 19:27:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 202 transitions. [2020-10-26 19:27:26,468 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 202 transitions. Word has length 181 [2020-10-26 19:27:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:26,469 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 202 transitions. [2020-10-26 19:27:26,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:27:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 202 transitions. [2020-10-26 19:27:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-26 19:27:26,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:26,472 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:26,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:27:26,472 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1906013370, now seen corresponding path program 20 times [2020-10-26 19:27:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:26,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925209976] [2020-10-26 19:27:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:26,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:27,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:31,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:31,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 19:27:31,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:31,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:27:31,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:27:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:27:31,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:31,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:31,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:31,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-26 19:27:31,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925209976] [2020-10-26 19:27:31,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:31,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:27:31,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819037112] [2020-10-26 19:27:31,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:27:31,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:31,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:27:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:31,897 INFO L87 Difference]: Start difference. First operand 194 states and 202 transitions. Second operand 24 states. [2020-10-26 19:27:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:32,393 INFO L93 Difference]: Finished difference Result 369 states and 392 transitions. [2020-10-26 19:27:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:27:32,394 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2020-10-26 19:27:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:32,396 INFO L225 Difference]: With dead ends: 369 [2020-10-26 19:27:32,396 INFO L226 Difference]: Without dead ends: 202 [2020-10-26 19:27:32,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-26 19:27:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-26 19:27:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-26 19:27:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 210 transitions. [2020-10-26 19:27:32,408 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 210 transitions. Word has length 189 [2020-10-26 19:27:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:32,408 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 210 transitions. [2020-10-26 19:27:32,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:27:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 210 transitions. [2020-10-26 19:27:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 19:27:32,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:32,410 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:32,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:27:32,410 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:32,411 INFO L82 PathProgramCache]: Analyzing trace with hash 346145078, now seen corresponding path program 21 times [2020-10-26 19:27:32,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:32,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252906093] [2020-10-26 19:27:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:32,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:37,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:37,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-26 19:27:37,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:27:37,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:27:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:27:37,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:37,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:37,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:37,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:37,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:37,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:37,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:37,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:37,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-26 19:27:37,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252906093] [2020-10-26 19:27:37,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:37,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:27:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205975732] [2020-10-26 19:27:37,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:27:37,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:27:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:37,923 INFO L87 Difference]: Start difference. First operand 202 states and 210 transitions. Second operand 25 states. [2020-10-26 19:27:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:38,438 INFO L93 Difference]: Finished difference Result 384 states and 407 transitions. [2020-10-26 19:27:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:27:38,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 197 [2020-10-26 19:27:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:38,443 INFO L225 Difference]: With dead ends: 384 [2020-10-26 19:27:38,443 INFO L226 Difference]: Without dead ends: 210 [2020-10-26 19:27:38,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-26 19:27:38,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-10-26 19:27:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-26 19:27:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 218 transitions. [2020-10-26 19:27:38,455 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 218 transitions. Word has length 197 [2020-10-26 19:27:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:38,456 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 218 transitions. [2020-10-26 19:27:38,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:27:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 218 transitions. [2020-10-26 19:27:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-26 19:27:38,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:38,457 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:38,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:27:38,458 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:38,458 INFO L82 PathProgramCache]: Analyzing trace with hash -149883590, now seen corresponding path program 22 times [2020-10-26 19:27:38,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:38,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42325510] [2020-10-26 19:27:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:38,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:43,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:43,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:43,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:43,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:43,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:43,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2020-10-26 19:27:43,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42325510] [2020-10-26 19:27:43,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:43,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:43,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741522584] [2020-10-26 19:27:43,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:43,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:43,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:43,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:43,978 INFO L87 Difference]: Start difference. First operand 210 states and 218 transitions. Second operand 26 states. [2020-10-26 19:27:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:44,597 INFO L93 Difference]: Finished difference Result 399 states and 422 transitions. [2020-10-26 19:27:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:44,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 205 [2020-10-26 19:27:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:44,599 INFO L225 Difference]: With dead ends: 399 [2020-10-26 19:27:44,599 INFO L226 Difference]: Without dead ends: 218 [2020-10-26 19:27:44,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-26 19:27:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-10-26 19:27:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-26 19:27:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 226 transitions. [2020-10-26 19:27:44,610 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 226 transitions. Word has length 205 [2020-10-26 19:27:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:44,610 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 226 transitions. [2020-10-26 19:27:44,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 226 transitions. [2020-10-26 19:27:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-26 19:27:44,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:44,612 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:44,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:44,612 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:44,613 INFO L82 PathProgramCache]: Analyzing trace with hash -8948298, now seen corresponding path program 23 times [2020-10-26 19:27:44,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:44,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184103124] [2020-10-26 19:27:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:44,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:44,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:49,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-26 19:27:49,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:49,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:27:49,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:49,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:49,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:49,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:49,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:50,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:50,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:50,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:50,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:50,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:50,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:50,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:50,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:50,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2020-10-26 19:27:50,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184103124] [2020-10-26 19:27:50,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:50,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:50,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384725760] [2020-10-26 19:27:50,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:50,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:50,188 INFO L87 Difference]: Start difference. First operand 218 states and 226 transitions. Second operand 27 states. [2020-10-26 19:27:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:50,800 INFO L93 Difference]: Finished difference Result 414 states and 437 transitions. [2020-10-26 19:27:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:50,800 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 213 [2020-10-26 19:27:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:50,802 INFO L225 Difference]: With dead ends: 414 [2020-10-26 19:27:50,802 INFO L226 Difference]: Without dead ends: 226 [2020-10-26 19:27:50,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-26 19:27:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-26 19:27:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-26 19:27:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 234 transitions. [2020-10-26 19:27:50,818 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 234 transitions. Word has length 213 [2020-10-26 19:27:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:50,819 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 234 transitions. [2020-10-26 19:27:50,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 234 transitions. [2020-10-26 19:27:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 19:27:50,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:50,821 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:50,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:50,824 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1062786490, now seen corresponding path program 24 times [2020-10-26 19:27:50,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:50,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806707816] [2020-10-26 19:27:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:55,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:55,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 19:27:55,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:55,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:27:55,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:55,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:55,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:55,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:56,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:56,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:56,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:56,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:56,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:56,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2020-10-26 19:27:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806707816] [2020-10-26 19:27:56,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:56,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:56,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253101467] [2020-10-26 19:27:56,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:56,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:56,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:56,466 INFO L87 Difference]: Start difference. First operand 226 states and 234 transitions. Second operand 28 states. [2020-10-26 19:27:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:57,056 INFO L93 Difference]: Finished difference Result 429 states and 452 transitions. [2020-10-26 19:27:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:27:57,056 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 221 [2020-10-26 19:27:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:57,058 INFO L225 Difference]: With dead ends: 429 [2020-10-26 19:27:57,058 INFO L226 Difference]: Without dead ends: 234 [2020-10-26 19:27:57,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:57,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-26 19:27:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-26 19:27:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-26 19:27:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 242 transitions. [2020-10-26 19:27:57,070 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 242 transitions. Word has length 221 [2020-10-26 19:27:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:57,070 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 242 transitions. [2020-10-26 19:27:57,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:27:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 242 transitions. [2020-10-26 19:27:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 19:27:57,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:57,073 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:57,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:27:57,073 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:57,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1271510474, now seen corresponding path program 25 times [2020-10-26 19:27:57,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:57,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081377518] [2020-10-26 19:27:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:28:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:02,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:02,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:02,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:02,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:02,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:02,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2600 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2275 trivial. 0 not checked. [2020-10-26 19:28:02,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081377518] [2020-10-26 19:28:02,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:02,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:28:02,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008661194] [2020-10-26 19:28:02,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:28:02,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:28:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:28:02,690 INFO L87 Difference]: Start difference. First operand 234 states and 242 transitions. Second operand 29 states. [2020-10-26 19:28:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:03,242 INFO L93 Difference]: Finished difference Result 444 states and 467 transitions. [2020-10-26 19:28:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:28:03,243 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 229 [2020-10-26 19:28:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:03,244 INFO L225 Difference]: With dead ends: 444 [2020-10-26 19:28:03,244 INFO L226 Difference]: Without dead ends: 242 [2020-10-26 19:28:03,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:28:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-26 19:28:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-26 19:28:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-26 19:28:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 250 transitions. [2020-10-26 19:28:03,255 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 250 transitions. Word has length 229 [2020-10-26 19:28:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:03,256 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 250 transitions. [2020-10-26 19:28:03,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:28:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 250 transitions. [2020-10-26 19:28:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 19:28:03,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:03,258 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:03,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:28:03,258 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash 961746490, now seen corresponding path program 26 times [2020-10-26 19:28:03,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:03,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264103963] [2020-10-26 19:28:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:03,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:04,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:28:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:08,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:08,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:08,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:08,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:08,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:08,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:08,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:08,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2020-10-26 19:28:08,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264103963] [2020-10-26 19:28:08,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:08,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:28:08,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614570171] [2020-10-26 19:28:08,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:28:08,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:28:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:28:08,943 INFO L87 Difference]: Start difference. First operand 242 states and 250 transitions. Second operand 30 states. [2020-10-26 19:28:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:09,531 INFO L93 Difference]: Finished difference Result 459 states and 482 transitions. [2020-10-26 19:28:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:28:09,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 237 [2020-10-26 19:28:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:09,533 INFO L225 Difference]: With dead ends: 459 [2020-10-26 19:28:09,533 INFO L226 Difference]: Without dead ends: 250 [2020-10-26 19:28:09,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:28:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-26 19:28:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-26 19:28:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-26 19:28:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 258 transitions. [2020-10-26 19:28:09,547 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 258 transitions. Word has length 237 [2020-10-26 19:28:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:09,548 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 258 transitions. [2020-10-26 19:28:09,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:28:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 258 transitions. [2020-10-26 19:28:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 19:28:09,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:09,550 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:09,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:28:09,550 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:09,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1367458122, now seen corresponding path program 27 times [2020-10-26 19:28:09,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:09,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375421408] [2020-10-26 19:28:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:09,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:14,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:14,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 19:28:14,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:14,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:28:14,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:28:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:28:14,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:15,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:15,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:15,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:15,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:15,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:15,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:15,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:15,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:15,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-26 19:28:15,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375421408] [2020-10-26 19:28:15,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:15,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:28:15,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011440531] [2020-10-26 19:28:15,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:28:15,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:15,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:28:15,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:15,273 INFO L87 Difference]: Start difference. First operand 250 states and 258 transitions. Second operand 31 states. [2020-10-26 19:28:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:15,851 INFO L93 Difference]: Finished difference Result 474 states and 497 transitions. [2020-10-26 19:28:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:28:15,851 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 245 [2020-10-26 19:28:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:15,854 INFO L225 Difference]: With dead ends: 474 [2020-10-26 19:28:15,854 INFO L226 Difference]: Without dead ends: 258 [2020-10-26 19:28:15,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-26 19:28:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-26 19:28:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-26 19:28:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 266 transitions. [2020-10-26 19:28:15,869 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 266 transitions. Word has length 245 [2020-10-26 19:28:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:15,869 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 266 transitions. [2020-10-26 19:28:15,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:28:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 266 transitions. [2020-10-26 19:28:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 19:28:15,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:15,871 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:15,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:28:15,872 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1440724666, now seen corresponding path program 28 times [2020-10-26 19:28:15,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:15,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007408700] [2020-10-26 19:28:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:16,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:28:21,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:21,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:21,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:21,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:21,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:21,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:21,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:21,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3248 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2842 trivial. 0 not checked. [2020-10-26 19:28:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007408700] [2020-10-26 19:28:21,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:21,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:28:21,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792963057] [2020-10-26 19:28:21,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:28:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:28:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:21,664 INFO L87 Difference]: Start difference. First operand 258 states and 266 transitions. Second operand 32 states. [2020-10-26 19:28:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:22,262 INFO L93 Difference]: Finished difference Result 489 states and 512 transitions. [2020-10-26 19:28:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:28:22,263 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 253 [2020-10-26 19:28:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:22,265 INFO L225 Difference]: With dead ends: 489 [2020-10-26 19:28:22,265 INFO L226 Difference]: Without dead ends: 266 [2020-10-26 19:28:22,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-26 19:28:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2020-10-26 19:28:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-26 19:28:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 274 transitions. [2020-10-26 19:28:22,279 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 274 transitions. Word has length 253 [2020-10-26 19:28:22,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:22,280 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 274 transitions. [2020-10-26 19:28:22,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:28:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 274 transitions. [2020-10-26 19:28:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 19:28:22,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:22,282 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:22,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:28:22,282 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:22,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:22,282 INFO L82 PathProgramCache]: Analyzing trace with hash 133124918, now seen corresponding path program 29 times [2020-10-26 19:28:22,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:22,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238875981] [2020-10-26 19:28:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:22,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:28:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:27,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:27,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:27,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2020-10-26 19:28:28,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238875981] [2020-10-26 19:28:28,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:28,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:28:28,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575194362] [2020-10-26 19:28:28,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:28:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:28:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:28,021 INFO L87 Difference]: Start difference. First operand 266 states and 274 transitions. Second operand 33 states. [2020-10-26 19:28:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:28,669 INFO L93 Difference]: Finished difference Result 504 states and 527 transitions. [2020-10-26 19:28:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:28:28,694 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 261 [2020-10-26 19:28:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:28,695 INFO L225 Difference]: With dead ends: 504 [2020-10-26 19:28:28,695 INFO L226 Difference]: Without dead ends: 274 [2020-10-26 19:28:28,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-26 19:28:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-10-26 19:28:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-26 19:28:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 282 transitions. [2020-10-26 19:28:28,708 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 282 transitions. Word has length 261 [2020-10-26 19:28:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:28,708 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 282 transitions. [2020-10-26 19:28:28,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:28:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 282 transitions. [2020-10-26 19:28:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-26 19:28:28,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:28,710 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:28,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:28:28,711 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2015447238, now seen corresponding path program 30 times [2020-10-26 19:28:28,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:28,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949979856] [2020-10-26 19:28:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:28,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:33,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:28:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:34,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:34,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:34,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:34,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:34,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3720 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3255 trivial. 0 not checked. [2020-10-26 19:28:34,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949979856] [2020-10-26 19:28:34,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:34,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:28:34,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146529690] [2020-10-26 19:28:34,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:28:34,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:34,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:28:34,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:34,538 INFO L87 Difference]: Start difference. First operand 274 states and 282 transitions. Second operand 34 states. [2020-10-26 19:28:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:35,258 INFO L93 Difference]: Finished difference Result 519 states and 542 transitions. [2020-10-26 19:28:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:28:35,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 269 [2020-10-26 19:28:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:35,260 INFO L225 Difference]: With dead ends: 519 [2020-10-26 19:28:35,260 INFO L226 Difference]: Without dead ends: 282 [2020-10-26 19:28:35,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-26 19:28:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-10-26 19:28:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-26 19:28:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 290 transitions. [2020-10-26 19:28:35,273 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 290 transitions. Word has length 269 [2020-10-26 19:28:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:35,273 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 290 transitions. [2020-10-26 19:28:35,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:28:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 290 transitions. [2020-10-26 19:28:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-26 19:28:35,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:35,275 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:35,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:28:35,276 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2015987638, now seen corresponding path program 31 times [2020-10-26 19:28:35,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:35,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539146166] [2020-10-26 19:28:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:35,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:35,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:40,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 19:28:40,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:40,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:28:40,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:40,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:28:40,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:40,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:28:40,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:41,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:41,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:41,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:41,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:41,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:41,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:41,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:41,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2020-10-26 19:28:41,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539146166] [2020-10-26 19:28:41,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:41,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:28:41,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360873380] [2020-10-26 19:28:41,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:28:41,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:28:41,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:41,136 INFO L87 Difference]: Start difference. First operand 282 states and 290 transitions. Second operand 35 states. [2020-10-26 19:28:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:41,845 INFO L93 Difference]: Finished difference Result 534 states and 557 transitions. [2020-10-26 19:28:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:28:41,845 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 277 [2020-10-26 19:28:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:41,847 INFO L225 Difference]: With dead ends: 534 [2020-10-26 19:28:41,847 INFO L226 Difference]: Without dead ends: 290 [2020-10-26 19:28:41,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-26 19:28:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2020-10-26 19:28:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-26 19:28:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 298 transitions. [2020-10-26 19:28:41,859 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 298 transitions. Word has length 277 [2020-10-26 19:28:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:41,860 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 298 transitions. [2020-10-26 19:28:41,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:28:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 298 transitions. [2020-10-26 19:28:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-26 19:28:41,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:41,862 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:41,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:28:41,862 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:41,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1144002490, now seen corresponding path program 32 times [2020-10-26 19:28:41,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:41,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623398194] [2020-10-26 19:28:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:42,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:47,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:47,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:47,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:47,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:47,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2020-10-26 19:28:47,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623398194] [2020-10-26 19:28:47,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:47,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:47,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141843924] [2020-10-26 19:28:47,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:47,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:47,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:47,862 INFO L87 Difference]: Start difference. First operand 290 states and 298 transitions. Second operand 36 states. [2020-10-26 19:28:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:48,708 INFO L93 Difference]: Finished difference Result 549 states and 572 transitions. [2020-10-26 19:28:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:28:48,708 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 285 [2020-10-26 19:28:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:48,710 INFO L225 Difference]: With dead ends: 549 [2020-10-26 19:28:48,710 INFO L226 Difference]: Without dead ends: 298 [2020-10-26 19:28:48,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-26 19:28:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-10-26 19:28:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-26 19:28:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 306 transitions. [2020-10-26 19:28:48,723 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 306 transitions. Word has length 285 [2020-10-26 19:28:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:48,723 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 306 transitions. [2020-10-26 19:28:48,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:28:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 306 transitions. [2020-10-26 19:28:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-26 19:28:48,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:48,725 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:48,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:28:48,725 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1422711862, now seen corresponding path program 33 times [2020-10-26 19:28:48,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:48,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450553250] [2020-10-26 19:28:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:48,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:49,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:49,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:53,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 19:28:53,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:53,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 19:28:53,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:53,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:28:53,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:53,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:28:53,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:54,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:54,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:54,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:54,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:54,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4488 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2020-10-26 19:28:54,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450553250] [2020-10-26 19:28:54,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:54,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:28:54,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772315812] [2020-10-26 19:28:54,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:28:54,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:54,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:28:54,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:54,743 INFO L87 Difference]: Start difference. First operand 298 states and 306 transitions. Second operand 37 states. [2020-10-26 19:28:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:55,524 INFO L93 Difference]: Finished difference Result 564 states and 587 transitions. [2020-10-26 19:28:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:28:55,524 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 293 [2020-10-26 19:28:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:55,527 INFO L225 Difference]: With dead ends: 564 [2020-10-26 19:28:55,527 INFO L226 Difference]: Without dead ends: 306 [2020-10-26 19:28:55,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:55,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-26 19:28:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2020-10-26 19:28:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-26 19:28:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 314 transitions. [2020-10-26 19:28:55,541 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 314 transitions. Word has length 293 [2020-10-26 19:28:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:55,541 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 314 transitions. [2020-10-26 19:28:55,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:28:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 314 transitions. [2020-10-26 19:28:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-26 19:28:55,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:55,544 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:55,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:28:55,544 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:55,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2118920134, now seen corresponding path program 34 times [2020-10-26 19:28:55,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:55,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158008691] [2020-10-26 19:28:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:55,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:00,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:29:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:01,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:01,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:01,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:01,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:01,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4165 trivial. 0 not checked. [2020-10-26 19:29:01,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158008691] [2020-10-26 19:29:01,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:01,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:29:01,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341686646] [2020-10-26 19:29:01,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:29:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:01,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:29:01,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:29:01,606 INFO L87 Difference]: Start difference. First operand 306 states and 314 transitions. Second operand 38 states. [2020-10-26 19:29:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:02,413 INFO L93 Difference]: Finished difference Result 579 states and 602 transitions. [2020-10-26 19:29:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:29:02,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 301 [2020-10-26 19:29:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:02,416 INFO L225 Difference]: With dead ends: 579 [2020-10-26 19:29:02,416 INFO L226 Difference]: Without dead ends: 314 [2020-10-26 19:29:02,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:29:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-26 19:29:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2020-10-26 19:29:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-26 19:29:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 322 transitions. [2020-10-26 19:29:02,429 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 322 transitions. Word has length 301 [2020-10-26 19:29:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:02,429 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 322 transitions. [2020-10-26 19:29:02,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:29:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 322 transitions. [2020-10-26 19:29:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-26 19:29:02,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:02,431 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:02,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:29:02,432 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1854320458, now seen corresponding path program 35 times [2020-10-26 19:29:02,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:02,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499299540] [2020-10-26 19:29:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:02,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:02,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:03,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:03,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:03,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:07,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:07,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-26 19:29:07,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:07,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:29:07,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:07,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:29:07,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:07,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:29:07,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:08,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:08,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2020-10-26 19:29:08,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499299540] [2020-10-26 19:29:08,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:08,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:29:08,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361178784] [2020-10-26 19:29:08,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:29:08,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:08,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:29:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:29:08,503 INFO L87 Difference]: Start difference. First operand 314 states and 322 transitions. Second operand 39 states. [2020-10-26 19:29:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:09,446 INFO L93 Difference]: Finished difference Result 594 states and 617 transitions. [2020-10-26 19:29:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:29:09,447 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 309 [2020-10-26 19:29:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:09,448 INFO L225 Difference]: With dead ends: 594 [2020-10-26 19:29:09,449 INFO L226 Difference]: Without dead ends: 322 [2020-10-26 19:29:09,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:29:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-26 19:29:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-10-26 19:29:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-26 19:29:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 330 transitions. [2020-10-26 19:29:09,459 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 330 transitions. Word has length 309 [2020-10-26 19:29:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:09,460 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 330 transitions. [2020-10-26 19:29:09,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:29:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 330 transitions. [2020-10-26 19:29:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-26 19:29:09,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:09,462 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:09,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:29:09,463 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:09,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1186334534, now seen corresponding path program 36 times [2020-10-26 19:29:09,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:09,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888386199] [2020-10-26 19:29:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:09,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:10,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:10,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:29:14,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:15,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 4662 trivial. 0 not checked. [2020-10-26 19:29:15,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888386199] [2020-10-26 19:29:15,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:15,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:29:15,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559391974] [2020-10-26 19:29:15,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:29:15,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:29:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:29:15,628 INFO L87 Difference]: Start difference. First operand 322 states and 330 transitions. Second operand 40 states. [2020-10-26 19:29:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:16,584 INFO L93 Difference]: Finished difference Result 609 states and 632 transitions. [2020-10-26 19:29:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:29:16,585 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2020-10-26 19:29:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:16,587 INFO L225 Difference]: With dead ends: 609 [2020-10-26 19:29:16,587 INFO L226 Difference]: Without dead ends: 330 [2020-10-26 19:29:16,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:29:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-26 19:29:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2020-10-26 19:29:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-26 19:29:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 338 transitions. [2020-10-26 19:29:16,600 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 338 transitions. Word has length 317 [2020-10-26 19:29:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:16,600 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 338 transitions. [2020-10-26 19:29:16,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:29:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 338 transitions. [2020-10-26 19:29:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-26 19:29:16,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:16,603 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:16,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:29:16,603 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:16,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1076959946, now seen corresponding path program 37 times [2020-10-26 19:29:16,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:16,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345953390] [2020-10-26 19:29:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:17,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:17,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:17,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:17,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking...