/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/eca-rers2012/Problem03_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:41:38,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:41:38,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:41:38,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:41:38,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:41:38,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:41:38,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:41:38,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:41:38,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:41:38,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:41:38,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:41:38,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:41:38,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:41:38,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:41:38,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:41:38,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:41:38,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:41:38,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:41:38,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:41:38,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:41:38,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:41:38,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:41:38,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:41:38,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:41:38,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:41:38,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:41:38,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:41:38,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:41:38,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:41:38,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:41:38,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:41:38,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:41:38,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:41:38,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:41:38,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:41:38,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:41:38,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:41:38,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:41:38,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:41:38,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:41:38,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:41:38,756 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 20:41:38,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:41:38,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:41:38,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:41:38,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:41:38,808 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:41:38,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:41:38,809 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:41:38,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:41:38,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:41:38,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:41:38,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:41:38,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:41:38,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:41:38,810 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:41:38,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:41:38,811 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:41:38,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:41:38,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:41:38,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:41:38,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:41:38,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:41:38,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:38,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:41:38,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:41:38,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:41:38,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:41:38,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:41:38,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:41:38,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:41:38,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:41:39,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:41:39,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:41:39,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:41:39,222 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:41:39,223 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:41:39,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09.c [2020-10-26 20:41:39,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69a9cf4d6/084e146903a749c9b2f411a39fdb2643/FLAG538301bcd [2020-10-26 20:41:40,302 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:41:40,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label09.c [2020-10-26 20:41:40,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69a9cf4d6/084e146903a749c9b2f411a39fdb2643/FLAG538301bcd [2020-10-26 20:41:40,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69a9cf4d6/084e146903a749c9b2f411a39fdb2643 [2020-10-26 20:41:40,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:41:40,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:41:40,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:40,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:41:40,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:41:40,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:40" (1/1) ... [2020-10-26 20:41:40,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ffe4bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:40, skipping insertion in model container [2020-10-26 20:41:40,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:40" (1/1) ... [2020-10-26 20:41:40,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:41:40,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:41:41,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:41,882 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:41:42,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:42,173 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:41:42,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42 WrapperNode [2020-10-26 20:41:42,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:42,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:41:42,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:41:42,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:41:42,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (1/1) ... [2020-10-26 20:41:42,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (1/1) ... [2020-10-26 20:41:42,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (1/1) ... [2020-10-26 20:41:42,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (1/1) ... [2020-10-26 20:41:42,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (1/1) ... [2020-10-26 20:41:42,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (1/1) ... [2020-10-26 20:41:42,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (1/1) ... [2020-10-26 20:41:42,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:41:42,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:41:42,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:41:42,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:41:42,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (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 20:41:42,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:41:42,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:41:42,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:41:42,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:41:42,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:41:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:41:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:41:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:41:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:41:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:41:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:41:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:41:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:41:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:41:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:41:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:41:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:41:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:41:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:41:45,172 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:41:45,172 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:41:45,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:45 BoogieIcfgContainer [2020-10-26 20:41:45,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:41:45,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:41:45,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:41:45,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:41:45,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:41:40" (1/3) ... [2020-10-26 20:41:45,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d35eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:45, skipping insertion in model container [2020-10-26 20:41:45,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:42" (2/3) ... [2020-10-26 20:41:45,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d35eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:45, skipping insertion in model container [2020-10-26 20:41:45,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:45" (3/3) ... [2020-10-26 20:41:45,189 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label09.c [2020-10-26 20:41:45,202 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:41:45,208 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:41:45,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:41:45,265 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:41:45,266 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:41:45,266 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:41:45,266 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:41:45,266 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:41:45,266 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:41:45,266 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:41:45,266 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:41:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:41:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-26 20:41:45,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:41:45,318 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:41:45,319 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:41:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:41:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash 342085780, now seen corresponding path program 1 times [2020-10-26 20:41:45,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:41:45,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241366568] [2020-10-26 20:41:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:41:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:45,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:46,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:49,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:49,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-26 20:41:49,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:41:49,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4009 [2020-10-26 20:41:49,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:41:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:41:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:41:49,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:41:50,380 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-26 20:41:50,567 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:41:50,733 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:41:50,906 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:41:51,079 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 20:41:51,223 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 20:41:51,356 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-26 20:41:52,009 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:41:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:41:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:52,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:52,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:52,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:41:52,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:52,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:41:52,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:41:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:41:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:41:52,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:41:52,944 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 20:41:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241366568] [2020-10-26 20:41:52,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:41:52,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:41:52,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518466728] [2020-10-26 20:41:52,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:41:52,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:41:52,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:41:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:41:52,982 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:41:53,588 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:41:54,607 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:41:55,614 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:41:56,688 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:41:58,382 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:42:00,300 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:42:02,368 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:42:06,198 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:42:07,547 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 231 DAG size of output: 198 [2020-10-26 20:42:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:10,570 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:42:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:42:10,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 155 [2020-10-26 20:42:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:10,598 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:42:10,598 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:42:10,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:42:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:42:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:42:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:42:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:42:10,738 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 155 [2020-10-26 20:42:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:10,742 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:42:10,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:42:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:42:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-26 20:42:10,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:10,757 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:10,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:42:10,758 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:10,759 INFO L82 PathProgramCache]: Analyzing trace with hash 702825863, now seen corresponding path program 1 times [2020-10-26 20:42:10,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:10,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943371666] [2020-10-26 20:42:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:10,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:11,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:12,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:14,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:14,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-26 20:42:14,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3622 [2020-10-26 20:42:14,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-26 20:42:14,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 20:42:14,852 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:14,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:14,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:14,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:14,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:14,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:14,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:42:14,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:14,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:14,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:14,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:14,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:14,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:15,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:15,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:15,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:42:15,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:15,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:15,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:42:15,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943371666] [2020-10-26 20:42:15,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:15,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:15,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347161243] [2020-10-26 20:42:15,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:42:15,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:15,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:42:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:15,156 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:42:15,453 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:18,426 INFO L93 Difference]: Finished difference Result 831 states and 1293 transitions. [2020-10-26 20:42:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:42:18,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2020-10-26 20:42:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:18,436 INFO L225 Difference]: With dead ends: 831 [2020-10-26 20:42:18,436 INFO L226 Difference]: Without dead ends: 587 [2020-10-26 20:42:18,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-26 20:42:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 581. [2020-10-26 20:42:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-26 20:42:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 780 transitions. [2020-10-26 20:42:18,477 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 780 transitions. Word has length 166 [2020-10-26 20:42:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:18,478 INFO L481 AbstractCegarLoop]: Abstraction has 581 states and 780 transitions. [2020-10-26 20:42:18,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:42:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 780 transitions. [2020-10-26 20:42:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-26 20:42:18,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:18,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1] [2020-10-26 20:42:18,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:42:18,482 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1118935643, now seen corresponding path program 1 times [2020-10-26 20:42:18,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:18,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14806875] [2020-10-26 20:42:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:18,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:19,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:19,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-26 20:42:19,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-10-26 20:42:19,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-26 20:42:19,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:20,361 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:20,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:20,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:20,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:20,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:42:20,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:20,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:20,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:20,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:20,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:20,539 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:42:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:20,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:20,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:20,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:20,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 20:42:20,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:20,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:42:20,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14806875] [2020-10-26 20:42:20,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:20,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:20,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677452142] [2020-10-26 20:42:20,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:42:20,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:20,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:42:20,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:20,787 INFO L87 Difference]: Start difference. First operand 581 states and 780 transitions. Second operand 6 states. [2020-10-26 20:42:21,029 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:24,547 INFO L93 Difference]: Finished difference Result 1524 states and 2138 transitions. [2020-10-26 20:42:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:42:24,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2020-10-26 20:42:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:24,562 INFO L225 Difference]: With dead ends: 1524 [2020-10-26 20:42:24,562 INFO L226 Difference]: Without dead ends: 1064 [2020-10-26 20:42:24,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2020-10-26 20:42:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1050. [2020-10-26 20:42:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1050 states. [2020-10-26 20:42:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1421 transitions. [2020-10-26 20:42:24,613 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1421 transitions. Word has length 176 [2020-10-26 20:42:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:24,614 INFO L481 AbstractCegarLoop]: Abstraction has 1050 states and 1421 transitions. [2020-10-26 20:42:24,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:42:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1421 transitions. [2020-10-26 20:42:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-26 20:42:24,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:24,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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 20:42:24,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:42:24,619 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash 52923868, now seen corresponding path program 1 times [2020-10-26 20:42:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:24,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502367903] [2020-10-26 20:42:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:24,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:24,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:25,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:28,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:28,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 20:42:28,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:42:28,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3538 [2020-10-26 20:42:28,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:28,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:28,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:28,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:42:28,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:28,528 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:28,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:28,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:28,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:28,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:28,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:42:28,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 20:42:28,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:28,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:28,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:28,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:28,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:28,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 20:42:28,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:28,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:28,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:28,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:28,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:28,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:28,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:28,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:28,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:42:28,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:28,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:42:28,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:28,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:28,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:42:28,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 20:42:28,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502367903] [2020-10-26 20:42:28,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:28,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:42:28,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804417110] [2020-10-26 20:42:28,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:42:28,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:42:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:28,882 INFO L87 Difference]: Start difference. First operand 1050 states and 1421 transitions. Second operand 7 states. [2020-10-26 20:42:29,121 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:32,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:32,955 INFO L93 Difference]: Finished difference Result 2931 states and 4099 transitions. [2020-10-26 20:42:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:42:32,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 185 [2020-10-26 20:42:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:32,973 INFO L225 Difference]: With dead ends: 2931 [2020-10-26 20:42:32,973 INFO L226 Difference]: Without dead ends: 2002 [2020-10-26 20:42:32,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:42:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-10-26 20:42:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1972. [2020-10-26 20:42:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1972 states. [2020-10-26 20:42:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2729 transitions. [2020-10-26 20:42:33,065 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2729 transitions. Word has length 185 [2020-10-26 20:42:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:33,066 INFO L481 AbstractCegarLoop]: Abstraction has 1972 states and 2729 transitions. [2020-10-26 20:42:33,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:42:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2729 transitions. [2020-10-26 20:42:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 20:42:33,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:33,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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 20:42:33,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:42:33,073 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 665590764, now seen corresponding path program 1 times [2020-10-26 20:42:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:33,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994942873] [2020-10-26 20:42:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:34,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:37,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-26 20:42:37,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:37,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4621 [2020-10-26 20:42:37,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:37,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:37,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:37,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:42:37,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:38,010 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:38,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:38,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:38,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:38,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:42:38,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:38,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:38,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:38,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:38,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:38,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:38,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:38,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:38,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:38,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 20:42:38,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:38,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:38,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:38,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:38,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:38,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:38,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:38,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:42:38,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:38,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 20:42:38,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:38,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:38,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:38,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:42:38,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994942873] [2020-10-26 20:42:38,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:38,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:38,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920663907] [2020-10-26 20:42:38,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:38,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:38,624 INFO L87 Difference]: Start difference. First operand 1972 states and 2729 transitions. Second operand 8 states. [2020-10-26 20:42:38,937 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:41,019 INFO L93 Difference]: Finished difference Result 3759 states and 5285 transitions. [2020-10-26 20:42:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:42:41,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 193 [2020-10-26 20:42:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:41,030 INFO L225 Difference]: With dead ends: 3759 [2020-10-26 20:42:41,031 INFO L226 Difference]: Without dead ends: 1908 [2020-10-26 20:42:41,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:42:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-10-26 20:42:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1904. [2020-10-26 20:42:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1904 states. [2020-10-26 20:42:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 2567 transitions. [2020-10-26 20:42:41,104 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 2567 transitions. Word has length 193 [2020-10-26 20:42:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:41,105 INFO L481 AbstractCegarLoop]: Abstraction has 1904 states and 2567 transitions. [2020-10-26 20:42:41,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 2567 transitions. [2020-10-26 20:42:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 20:42:41,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:41,110 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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 20:42:41,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:42:41,111 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash 733638952, now seen corresponding path program 1 times [2020-10-26 20:42:41,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:41,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528137536] [2020-10-26 20:42:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:41,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:41,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:45,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:45,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 20:42:45,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:45,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4286 [2020-10-26 20:42:45,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 20:42:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:45,697 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:45,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:45,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:45,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:45,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:45,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:45,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:42:45,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:45,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:45,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:45,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:45,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:45,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:45,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:45,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:45,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:46,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:46,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:42:46,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:46,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 20:42:46,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:46,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:46,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:42:46,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:46,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528137536] [2020-10-26 20:42:46,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:46,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:46,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680233965] [2020-10-26 20:42:46,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:46,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:46,122 INFO L87 Difference]: Start difference. First operand 1904 states and 2567 transitions. Second operand 8 states. [2020-10-26 20:42:46,463 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:50,359 INFO L93 Difference]: Finished difference Result 5539 states and 7658 transitions. [2020-10-26 20:42:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:42:50,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 194 [2020-10-26 20:42:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:50,381 INFO L225 Difference]: With dead ends: 5539 [2020-10-26 20:42:50,382 INFO L226 Difference]: Without dead ends: 3756 [2020-10-26 20:42:50,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:42:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2020-10-26 20:42:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 3709. [2020-10-26 20:42:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3709 states. [2020-10-26 20:42:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5038 transitions. [2020-10-26 20:42:50,525 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5038 transitions. Word has length 194 [2020-10-26 20:42:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:50,526 INFO L481 AbstractCegarLoop]: Abstraction has 3709 states and 5038 transitions. [2020-10-26 20:42:50,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5038 transitions. [2020-10-26 20:42:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-26 20:42:50,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:50,531 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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 20:42:50,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:42:50,532 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1627977980, now seen corresponding path program 1 times [2020-10-26 20:42:50,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:50,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407799275] [2020-10-26 20:42:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:50,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:53,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:53,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 20:42:53,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:53,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2504 [2020-10-26 20:42:53,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:42:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:42:53,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:53,358 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:53,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:53,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:53,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:53,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:53,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:42:53,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:53,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:53,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:53,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:53,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:53,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:42:53,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:53,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:42:53,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:53,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:53,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:53,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:42:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:53,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:53,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:53,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:42:53,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 20:42:53,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:53,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:42:53,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:42:53,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407799275] [2020-10-26 20:42:53,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:53,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:42:53,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385584119] [2020-10-26 20:42:53,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:42:53,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:42:53,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:42:53,816 INFO L87 Difference]: Start difference. First operand 3709 states and 5038 transitions. Second operand 10 states. [2020-10-26 20:42:54,148 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:54,526 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:42:55,253 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-26 20:43:00,955 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:43:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:02,558 INFO L93 Difference]: Finished difference Result 13394 states and 19464 transitions. [2020-10-26 20:43:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 20:43:02,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 201 [2020-10-26 20:43:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:02,621 INFO L225 Difference]: With dead ends: 13394 [2020-10-26 20:43:02,621 INFO L226 Difference]: Without dead ends: 9806 [2020-10-26 20:43:02,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:43:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9806 states. [2020-10-26 20:43:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9806 to 9546. [2020-10-26 20:43:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9546 states. [2020-10-26 20:43:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9546 states to 9546 states and 13050 transitions. [2020-10-26 20:43:02,937 INFO L78 Accepts]: Start accepts. Automaton has 9546 states and 13050 transitions. Word has length 201 [2020-10-26 20:43:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:02,938 INFO L481 AbstractCegarLoop]: Abstraction has 9546 states and 13050 transitions. [2020-10-26 20:43:02,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:43:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9546 states and 13050 transitions. [2020-10-26 20:43:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:43:02,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:02,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 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, 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, 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 20:43:02,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:43:02,947 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1155004103, now seen corresponding path program 1 times [2020-10-26 20:43:02,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:02,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333953271] [2020-10-26 20:43:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:03,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:03,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 20:43:04,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:04,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-26 20:43:04,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:43:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:43:04,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,584 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:04,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:04,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:43:04,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:04,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:04,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:04,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:04,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:43:04,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:43:04,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:43:04,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 20:43:04,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 20:43:04,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:43:05,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333953271] [2020-10-26 20:43:05,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:05,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:05,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394377587] [2020-10-26 20:43:05,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:05,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:05,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:05,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:05,075 INFO L87 Difference]: Start difference. First operand 9546 states and 13050 transitions. Second operand 8 states. [2020-10-26 20:43:05,347 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:05,805 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:07,192 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:10,493 INFO L93 Difference]: Finished difference Result 23748 states and 33981 transitions. [2020-10-26 20:43:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:43:10,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2020-10-26 20:43:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:10,564 INFO L225 Difference]: With dead ends: 23748 [2020-10-26 20:43:10,564 INFO L226 Difference]: Without dead ends: 14323 [2020-10-26 20:43:10,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:43:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14323 states. [2020-10-26 20:43:10,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14323 to 14169. [2020-10-26 20:43:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14169 states. [2020-10-26 20:43:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14169 states to 14169 states and 18601 transitions. [2020-10-26 20:43:10,937 INFO L78 Accepts]: Start accepts. Automaton has 14169 states and 18601 transitions. Word has length 206 [2020-10-26 20:43:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:10,937 INFO L481 AbstractCegarLoop]: Abstraction has 14169 states and 18601 transitions. [2020-10-26 20:43:10,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 14169 states and 18601 transitions. [2020-10-26 20:43:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-26 20:43:10,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:10,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:10,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:43:10,951 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2115016958, now seen corresponding path program 1 times [2020-10-26 20:43:10,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:10,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673972446] [2020-10-26 20:43:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:11,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:12,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:14,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:14,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 20:43:14,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:14,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3749 [2020-10-26 20:43:14,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:14,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:14,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:14,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:43:14,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,062 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:15,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:15,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:15,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:15,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:43:15,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:15,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:15,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:15,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:15,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:15,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:15,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:43:15,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:15,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:15,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:43:15,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:15,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 20:43:15,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:15,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:15,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:43:15,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:43:15,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673972446] [2020-10-26 20:43:15,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:15,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:43:15,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027087809] [2020-10-26 20:43:15,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:15,593 INFO L87 Difference]: Start difference. First operand 14169 states and 18601 transitions. Second operand 7 states. [2020-10-26 20:43:15,933 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:43:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:19,270 INFO L93 Difference]: Finished difference Result 39186 states and 52922 transitions. [2020-10-26 20:43:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:43:19,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2020-10-26 20:43:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:19,375 INFO L225 Difference]: With dead ends: 39186 [2020-10-26 20:43:19,375 INFO L226 Difference]: Without dead ends: 25138 [2020-10-26 20:43:19,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:43:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25138 states. [2020-10-26 20:43:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25138 to 24845. [2020-10-26 20:43:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24845 states. [2020-10-26 20:43:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24845 states to 24845 states and 33131 transitions. [2020-10-26 20:43:20,147 INFO L78 Accepts]: Start accepts. Automaton has 24845 states and 33131 transitions. Word has length 248 [2020-10-26 20:43:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:20,148 INFO L481 AbstractCegarLoop]: Abstraction has 24845 states and 33131 transitions. [2020-10-26 20:43:20,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 24845 states and 33131 transitions. [2020-10-26 20:43:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 20:43:20,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:20,167 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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 20:43:20,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:43:20,168 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash 835728185, now seen corresponding path program 1 times [2020-10-26 20:43:20,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823563287] [2020-10-26 20:43:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:20,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:20,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:22,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:24,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 20:43:24,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:24,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4361 [2020-10-26 20:43:24,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 20:43:24,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:24,908 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:24,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:24,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:24,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:24,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:24,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:43:24,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:24,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:24,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:24,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:24,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:25,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:25,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:25,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:25,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:25,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:25,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 20:43:25,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:25,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:25,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:25,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:25,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:43:25,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:25,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 20:43:25,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:25,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:25,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:25,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 20:43:25,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:43:25,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823563287] [2020-10-26 20:43:25,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:25,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:25,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643938892] [2020-10-26 20:43:25,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:25,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:25,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:25,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:25,614 INFO L87 Difference]: Start difference. First operand 24845 states and 33131 transitions. Second operand 8 states. [2020-10-26 20:43:25,896 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:27,396 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:43:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:29,562 INFO L93 Difference]: Finished difference Result 57751 states and 78129 transitions. [2020-10-26 20:43:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:29,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 253 [2020-10-26 20:43:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:29,698 INFO L225 Difference]: With dead ends: 57751 [2020-10-26 20:43:29,698 INFO L226 Difference]: Without dead ends: 33027 [2020-10-26 20:43:29,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33027 states. [2020-10-26 20:43:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33027 to 32869. [2020-10-26 20:43:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32869 states. [2020-10-26 20:43:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32869 states to 32869 states and 44511 transitions. [2020-10-26 20:43:30,644 INFO L78 Accepts]: Start accepts. Automaton has 32869 states and 44511 transitions. Word has length 253 [2020-10-26 20:43:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:30,644 INFO L481 AbstractCegarLoop]: Abstraction has 32869 states and 44511 transitions. [2020-10-26 20:43:30,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32869 states and 44511 transitions. [2020-10-26 20:43:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 20:43:30,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:30,670 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:30,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:43:30,670 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:30,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:30,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1039511218, now seen corresponding path program 1 times [2020-10-26 20:43:30,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:30,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927826031] [2020-10-26 20:43:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:31,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:32,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:32,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 20:43:32,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:32,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1856 [2020-10-26 20:43:32,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:32,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:43:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 20:43:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:32,885 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:32,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:32,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:32,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:32,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:32,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:32,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:43:32,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:33,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:33,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:33,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:33,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:33,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:43:33,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:43:33,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:33,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:33,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:43:33,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:43:33,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927826031] [2020-10-26 20:43:33,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:33,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:33,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146591116] [2020-10-26 20:43:33,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:33,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:33,509 INFO L87 Difference]: Start difference. First operand 32869 states and 44511 transitions. Second operand 7 states. [2020-10-26 20:43:34,004 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:35,948 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:43:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:38,237 INFO L93 Difference]: Finished difference Result 91911 states and 137851 transitions. [2020-10-26 20:43:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:38,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2020-10-26 20:43:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:38,596 INFO L225 Difference]: With dead ends: 91911 [2020-10-26 20:43:38,596 INFO L226 Difference]: Without dead ends: 59163 [2020-10-26 20:43:38,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:43:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59163 states. [2020-10-26 20:43:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59163 to 57857. [2020-10-26 20:43:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57857 states. [2020-10-26 20:43:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57857 states to 57857 states and 75852 transitions. [2020-10-26 20:43:40,859 INFO L78 Accepts]: Start accepts. Automaton has 57857 states and 75852 transitions. Word has length 254 [2020-10-26 20:43:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:40,859 INFO L481 AbstractCegarLoop]: Abstraction has 57857 states and 75852 transitions. [2020-10-26 20:43:40,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 57857 states and 75852 transitions. [2020-10-26 20:43:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 20:43:40,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:40,898 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:40,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:43:40,898 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1333792470, now seen corresponding path program 1 times [2020-10-26 20:43:40,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:40,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117576201] [2020-10-26 20:43:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:41,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:41,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:42,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:42,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 20:43:42,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-26 20:43:42,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:42,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:42,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:43:42,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:43:42,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:42,732 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:42,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:42,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:42,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:42,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:42,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:42,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:42,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:42,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:42,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:43:42,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:42,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:42,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:42,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:43:42,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:42,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:42,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:43,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:43,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:43:43,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:43,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-26 20:43:43,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:43,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:43,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:43,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:43:43,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:43:43,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117576201] [2020-10-26 20:43:43,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:43,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:43,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003009261] [2020-10-26 20:43:43,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:43,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:43,296 INFO L87 Difference]: Start difference. First operand 57857 states and 75852 transitions. Second operand 7 states. [2020-10-26 20:43:43,786 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:45,002 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:43:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:48,371 INFO L93 Difference]: Finished difference Result 134399 states and 188481 transitions. [2020-10-26 20:43:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:43:48,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 258 [2020-10-26 20:43:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:48,719 INFO L225 Difference]: With dead ends: 134399 [2020-10-26 20:43:48,719 INFO L226 Difference]: Without dead ends: 76663 [2020-10-26 20:43:49,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76663 states. [2020-10-26 20:43:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76663 to 74028. [2020-10-26 20:43:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74028 states. [2020-10-26 20:43:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74028 states to 74028 states and 95275 transitions. [2020-10-26 20:43:51,372 INFO L78 Accepts]: Start accepts. Automaton has 74028 states and 95275 transitions. Word has length 258 [2020-10-26 20:43:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:51,373 INFO L481 AbstractCegarLoop]: Abstraction has 74028 states and 95275 transitions. [2020-10-26 20:43:51,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 74028 states and 95275 transitions. [2020-10-26 20:43:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 20:43:51,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:51,424 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:51,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:43:51,425 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1287578537, now seen corresponding path program 1 times [2020-10-26 20:43:51,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:51,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479615845] [2020-10-26 20:43:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:51,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:56,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:56,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-26 20:43:56,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 20:43:56,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:56,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:43:56,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:56,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:43:56,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:56,787 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:56,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:56,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:56,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:56,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:56,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:43:56,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:56,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:56,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:56,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:56,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:57,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:57,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:43:57,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:57,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 20:43:57,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:43:57,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:57,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:43:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:57,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:57,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:57,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:43:57,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:57,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:43:57,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:57,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:57,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-26 20:43:57,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:57,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:43:57,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479615845] [2020-10-26 20:43:57,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:57,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:57,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083880460] [2020-10-26 20:43:57,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:57,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:57,413 INFO L87 Difference]: Start difference. First operand 74028 states and 95275 transitions. Second operand 7 states. [2020-10-26 20:43:57,735 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:59,634 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:44:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:02,509 INFO L93 Difference]: Finished difference Result 187234 states and 240726 transitions. [2020-10-26 20:44:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:44:02,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2020-10-26 20:44:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:03,121 INFO L225 Difference]: With dead ends: 187234 [2020-10-26 20:44:03,121 INFO L226 Difference]: Without dead ends: 116160 [2020-10-26 20:44:03,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:44:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116160 states. [2020-10-26 20:44:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116160 to 115864. [2020-10-26 20:44:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115864 states. [2020-10-26 20:44:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115864 states to 115864 states and 148257 transitions. [2020-10-26 20:44:05,828 INFO L78 Accepts]: Start accepts. Automaton has 115864 states and 148257 transitions. Word has length 265 [2020-10-26 20:44:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:05,829 INFO L481 AbstractCegarLoop]: Abstraction has 115864 states and 148257 transitions. [2020-10-26 20:44:05,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:44:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 115864 states and 148257 transitions. [2020-10-26 20:44:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:44:06,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:06,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:06,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:44:06,177 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:06,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash 46786130, now seen corresponding path program 1 times [2020-10-26 20:44:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:06,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604217988] [2020-10-26 20:44:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:06,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:08,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1752 [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:44:08,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:08,312 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:08,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:08,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:08,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:08,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:08,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:44:08,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:08,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:08,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:08,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:08,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:08,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:44:08,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:08,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:44:08,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:08,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:08,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:08,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:44:08,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:08,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:44:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:08,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:08,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:08,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:44:08,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:08,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-26 20:44:08,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:44:08,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:44:08,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604217988] [2020-10-26 20:44:08,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:08,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:44:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061496790] [2020-10-26 20:44:08,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:44:08,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:44:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:44:08,887 INFO L87 Difference]: Start difference. First operand 115864 states and 148257 transitions. Second operand 7 states. [2020-10-26 20:44:09,416 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:10,719 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:18,375 INFO L93 Difference]: Finished difference Result 281846 states and 386163 transitions. [2020-10-26 20:44:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:44:18,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 272 [2020-10-26 20:44:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:19,029 INFO L225 Difference]: With dead ends: 281846 [2020-10-26 20:44:19,029 INFO L226 Difference]: Without dead ends: 166103 [2020-10-26 20:44:19,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:44:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166103 states. [2020-10-26 20:44:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166103 to 162801. [2020-10-26 20:44:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162801 states. [2020-10-26 20:44:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162801 states to 162801 states and 205257 transitions. [2020-10-26 20:44:23,469 INFO L78 Accepts]: Start accepts. Automaton has 162801 states and 205257 transitions. Word has length 272 [2020-10-26 20:44:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:23,470 INFO L481 AbstractCegarLoop]: Abstraction has 162801 states and 205257 transitions. [2020-10-26 20:44:23,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:44:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 162801 states and 205257 transitions. [2020-10-26 20:44:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-26 20:44:23,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:23,523 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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 20:44:23,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:44:23,524 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1415514883, now seen corresponding path program 1 times [2020-10-26 20:44:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:23,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691254979] [2020-10-26 20:44:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:23,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:23,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:23,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:25,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-26 20:44:28,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:44:28,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 20:44:28,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:44:28,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:28,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:44:28,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,864 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:28,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:28,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:28,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:44:28,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:28,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:29,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:29,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:44:29,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:29,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:29,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:29,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:29,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:44:29,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 20:44:29,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:44:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:29,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:44:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 20:44:29,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:29,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 118 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:44:29,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691254979] [2020-10-26 20:44:29,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:29,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:44:29,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004147961] [2020-10-26 20:44:29,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:29,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:29,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:29,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:29,398 INFO L87 Difference]: Start difference. First operand 162801 states and 205257 transitions. Second operand 8 states. [2020-10-26 20:44:29,677 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:31,716 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:44:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:35,660 INFO L93 Difference]: Finished difference Result 362045 states and 453852 transitions. [2020-10-26 20:44:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:44:35,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 275 [2020-10-26 20:44:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:36,262 INFO L225 Difference]: With dead ends: 362045 [2020-10-26 20:44:36,262 INFO L226 Difference]: Without dead ends: 199369 [2020-10-26 20:44:36,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199369 states. [2020-10-26 20:44:40,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199369 to 198630. [2020-10-26 20:44:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198630 states. [2020-10-26 20:44:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198630 states to 198630 states and 244597 transitions. [2020-10-26 20:44:41,228 INFO L78 Accepts]: Start accepts. Automaton has 198630 states and 244597 transitions. Word has length 275 [2020-10-26 20:44:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:41,229 INFO L481 AbstractCegarLoop]: Abstraction has 198630 states and 244597 transitions. [2020-10-26 20:44:41,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 198630 states and 244597 transitions. [2020-10-26 20:44:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-26 20:44:41,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:41,338 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:41,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:44:41,339 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1458861496, now seen corresponding path program 1 times [2020-10-26 20:44:41,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:41,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546048834] [2020-10-26 20:44:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:41,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:41,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:41,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:43,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:46,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:46,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:46,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 20:44:46,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:44:46,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 20:44:46,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 20:44:46,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:46,751 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:46,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:46,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:46,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:46,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:46,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:46,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:44:46,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:46,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:46,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:46,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:44:46,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:46,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:46,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:47,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:47,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:44:47,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:47,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 20:44:47,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:47,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:47,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:47,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:44:47,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:47,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 20:44:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:47,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:47,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:47,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:44:47,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:47,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:44:47,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:47,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:47,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:44:47,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:47,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:47,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:44:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:47,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-26 20:44:47,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:47,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-26 20:44:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546048834] [2020-10-26 20:44:47,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:47,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:44:47,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655585812] [2020-10-26 20:44:47,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:44:47,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:47,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:44:47,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:44:47,274 INFO L87 Difference]: Start difference. First operand 198630 states and 244597 transitions. Second operand 5 states. [2020-10-26 20:44:47,535 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:51,587 INFO L93 Difference]: Finished difference Result 393584 states and 484297 transitions. [2020-10-26 20:44:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:44:51,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 285 [2020-10-26 20:44:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:52,236 INFO L225 Difference]: With dead ends: 393584 [2020-10-26 20:44:52,236 INFO L226 Difference]: Without dead ends: 198776 [2020-10-26 20:44:52,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:44:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198776 states. [2020-10-26 20:44:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198776 to 198536. [2020-10-26 20:44:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198536 states. [2020-10-26 20:44:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198536 states to 198536 states and 244330 transitions. [2020-10-26 20:44:56,997 INFO L78 Accepts]: Start accepts. Automaton has 198536 states and 244330 transitions. Word has length 285 [2020-10-26 20:44:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:56,998 INFO L481 AbstractCegarLoop]: Abstraction has 198536 states and 244330 transitions. [2020-10-26 20:44:56,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:44:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 198536 states and 244330 transitions. [2020-10-26 20:44:57,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-26 20:44:57,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:57,054 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:57,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:44:57,054 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash -64901126, now seen corresponding path program 1 times [2020-10-26 20:44:57,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:57,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208734582] [2020-10-26 20:44:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:57,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:57,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:57,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:59,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking...