/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:36:51,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:36:51,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:36:51,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:36:51,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:36:51,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:36:51,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:36:51,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:36:51,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:36:51,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:36:51,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:36:51,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:36:51,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:36:51,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:36:51,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:36:51,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:36:51,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:36:51,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:36:51,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:36:51,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:36:51,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:36:51,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:36:51,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:36:51,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:36:51,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:36:51,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:36:51,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:36:51,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:36:51,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:36:51,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:36:51,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:36:51,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:36:51,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:36:51,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:36:51,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:36:51,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:36:51,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:36:51,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:36:51,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:36:51,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:36:51,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:36:51,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 17:36:52,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:36:52,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:36:52,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:36:52,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:36:52,055 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:36:52,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:36:52,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:36:52,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:36:52,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:36:52,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:36:52,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:36:52,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:36:52,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:36:52,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:36:52,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:36:52,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:36:52,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:36:52,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:36:52,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:36:52,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:36:52,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:36:52,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:36:52,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:36:52,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:36:52,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:36:52,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:36:52,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:36:52,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:36:52,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:36:52,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:36:52,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:36:52,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:36:52,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:36:52,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:36:52,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:36:52,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2020-10-27 17:36:52,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9887ccd75/b700fe02821a488386cf1f06cf1705a7/FLAG7ab2fb475 [2020-10-27 17:36:53,468 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:36:53,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2020-10-27 17:36:53,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9887ccd75/b700fe02821a488386cf1f06cf1705a7/FLAG7ab2fb475 [2020-10-27 17:36:53,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9887ccd75/b700fe02821a488386cf1f06cf1705a7 [2020-10-27 17:36:53,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:36:53,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:36:53,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:36:53,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:36:53,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:36:53,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:36:53" (1/1) ... [2020-10-27 17:36:53,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc9a94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:53, skipping insertion in model container [2020-10-27 17:36:53,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:36:53" (1/1) ... [2020-10-27 17:36:53,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:36:53,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:36:54,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:36:54,397 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:36:54,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:36:54,636 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:36:54,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54 WrapperNode [2020-10-27 17:36:54,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:36:54,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:36:54,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:36:54,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:36:54,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... [2020-10-27 17:36:54,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... [2020-10-27 17:36:54,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... [2020-10-27 17:36:54,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... [2020-10-27 17:36:54,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... [2020-10-27 17:36:54,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... [2020-10-27 17:36:54,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... [2020-10-27 17:36:54,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:36:54,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:36:54,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:36:54,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:36:54,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:36:54,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:36:54,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:36:54,910 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:36:54,910 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:36:54,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:36:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:36:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:36:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:36:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:36:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:36:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:36:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:36:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:36:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:36:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:36:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:36:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:36:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:36:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:36:57,465 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:36:57,466 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:36:57,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:36:57 BoogieIcfgContainer [2020-10-27 17:36:57,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:36:57,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:36:57,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:36:57,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:36:57,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:36:53" (1/3) ... [2020-10-27 17:36:57,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297c06c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:36:57, skipping insertion in model container [2020-10-27 17:36:57,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:54" (2/3) ... [2020-10-27 17:36:57,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297c06c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:36:57, skipping insertion in model container [2020-10-27 17:36:57,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:36:57" (3/3) ... [2020-10-27 17:36:57,481 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2020-10-27 17:36:57,495 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:36:57,520 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:36:57,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:36:57,569 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:36:57,570 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:36:57,570 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:36:57,570 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:36:57,570 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:36:57,570 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:36:57,570 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:36:57,571 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:36:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-27 17:36:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 17:36:57,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:36:57,611 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] [2020-10-27 17:36:57,612 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:36:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:36:57,619 INFO L82 PathProgramCache]: Analyzing trace with hash -740741712, now seen corresponding path program 1 times [2020-10-27 17:36:57,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:36:57,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874406044] [2020-10-27 17:36:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:36:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:36:57,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:36:58,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:36:58,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 17:36:58,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:36:58,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-27 17:36:58,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:36:58,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:36:58,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:36:58,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 17:36:58,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 17:36:58,835 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:36:58,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:36:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:36:58,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:36:58,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:36:58,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:36:58,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:36:58,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 17:36:58,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:36:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:36:58,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:36:58,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:36:58,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:36:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:36:58,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874406044] [2020-10-27 17:36:58,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:36:58,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 17:36:58,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131250989] [2020-10-27 17:36:58,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 17:36:58,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:36:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 17:36:58,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 17:36:58,944 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 4 states. [2020-10-27 17:36:59,197 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:37:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:03,472 INFO L93 Difference]: Finished difference Result 796 states and 1392 transitions. [2020-10-27 17:37:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:37:03,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-27 17:37:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:03,495 INFO L225 Difference]: With dead ends: 796 [2020-10-27 17:37:03,496 INFO L226 Difference]: Without dead ends: 435 [2020-10-27 17:37:03,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:37:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-27 17:37:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 431. [2020-10-27 17:37:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-27 17:37:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 619 transitions. [2020-10-27 17:37:03,632 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 619 transitions. Word has length 52 [2020-10-27 17:37:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:03,632 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 619 transitions. [2020-10-27 17:37:03,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 17:37:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 619 transitions. [2020-10-27 17:37:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 17:37:03,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:03,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 17:37:03,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:37:03,641 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 395772620, now seen corresponding path program 1 times [2020-10-27 17:37:03,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:03,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696945366] [2020-10-27 17:37:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:03,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:03,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:05,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:05,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:05,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 17:37:05,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:37:05,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2054 [2020-10-27 17:37:05,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 17:37:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 17:37:05,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:37:06,017 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:06,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:06,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:06,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:06,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:06,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:06,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:37:06,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:06,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:37:06,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:06,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:06,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:06,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 17:37:06,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:06,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 17:37:06,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:06,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 17:37:06,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:37:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696945366] [2020-10-27 17:37:06,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:06,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:37:06,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467570353] [2020-10-27 17:37:06,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:37:06,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:06,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:37:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:37:06,341 INFO L87 Difference]: Start difference. First operand 431 states and 619 transitions. Second operand 5 states. [2020-10-27 17:37:07,080 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 17:37:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:09,398 INFO L93 Difference]: Finished difference Result 881 states and 1265 transitions. [2020-10-27 17:37:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:37:09,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-27 17:37:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:09,404 INFO L225 Difference]: With dead ends: 881 [2020-10-27 17:37:09,404 INFO L226 Difference]: Without dead ends: 435 [2020-10-27 17:37:09,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:37:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-27 17:37:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 431. [2020-10-27 17:37:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-27 17:37:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 617 transitions. [2020-10-27 17:37:09,441 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 617 transitions. Word has length 124 [2020-10-27 17:37:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:09,441 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 617 transitions. [2020-10-27 17:37:09,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:37:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 617 transitions. [2020-10-27 17:37:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 17:37:09,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:09,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 17:37:09,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:37:09,452 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash 133232492, now seen corresponding path program 1 times [2020-10-27 17:37:09,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:09,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710628900] [2020-10-27 17:37:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:09,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:09,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:11,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:11,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 17:37:11,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:37:11,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1763 [2020-10-27 17:37:11,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 17:37:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 17:37:11,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:11,463 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:11,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:11,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:11,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:11,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:11,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:11,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:37:11,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:11,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:11,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:11,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:11,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 17:37:11,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:11,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 17:37:11,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:11,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:11,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:11,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 17:37:11,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:37:11,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710628900] [2020-10-27 17:37:11,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:11,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:37:11,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156083105] [2020-10-27 17:37:11,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:37:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:37:11,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:37:11,711 INFO L87 Difference]: Start difference. First operand 431 states and 617 transitions. Second operand 5 states. [2020-10-27 17:37:12,273 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:37:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:15,782 INFO L93 Difference]: Finished difference Result 1260 states and 1828 transitions. [2020-10-27 17:37:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:37:15,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-27 17:37:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:15,801 INFO L225 Difference]: With dead ends: 1260 [2020-10-27 17:37:15,801 INFO L226 Difference]: Without dead ends: 835 [2020-10-27 17:37:15,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:37:15,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2020-10-27 17:37:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 819. [2020-10-27 17:37:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-10-27 17:37:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1095 transitions. [2020-10-27 17:37:15,854 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1095 transitions. Word has length 125 [2020-10-27 17:37:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:15,855 INFO L481 AbstractCegarLoop]: Abstraction has 819 states and 1095 transitions. [2020-10-27 17:37:15,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:37:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1095 transitions. [2020-10-27 17:37:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 17:37:15,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:15,867 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 17:37:15,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:37:15,871 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash -377737400, now seen corresponding path program 1 times [2020-10-27 17:37:15,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:15,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251704606] [2020-10-27 17:37:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:15,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:16,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:16,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:17,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:17,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 17:37:17,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:37:17,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2043 [2020-10-27 17:37:17,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:17,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 17:37:17,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 17:37:17,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:18,192 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:18,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:18,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:18,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:18,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:18,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:18,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 17:37:18,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:18,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:18,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:18,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:18,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:18,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:18,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:18,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:18,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 17:37:18,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:18,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 17:37:18,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 17:37:18,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:37:18,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251704606] [2020-10-27 17:37:18,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:18,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:37:18,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400709334] [2020-10-27 17:37:18,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:37:18,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:18,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:37:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:37:18,463 INFO L87 Difference]: Start difference. First operand 819 states and 1095 transitions. Second operand 5 states. [2020-10-27 17:37:19,215 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-27 17:37:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:21,402 INFO L93 Difference]: Finished difference Result 1649 states and 2215 transitions. [2020-10-27 17:37:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:37:21,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-27 17:37:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:21,409 INFO L225 Difference]: With dead ends: 1649 [2020-10-27 17:37:21,410 INFO L226 Difference]: Without dead ends: 827 [2020-10-27 17:37:21,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:37:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-10-27 17:37:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 819. [2020-10-27 17:37:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-10-27 17:37:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1091 transitions. [2020-10-27 17:37:21,461 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1091 transitions. Word has length 126 [2020-10-27 17:37:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:21,463 INFO L481 AbstractCegarLoop]: Abstraction has 819 states and 1091 transitions. [2020-10-27 17:37:21,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:37:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1091 transitions. [2020-10-27 17:37:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 17:37:21,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:21,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 17:37:21,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:37:21,468 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:21,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1366731588, now seen corresponding path program 1 times [2020-10-27 17:37:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:21,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312611820] [2020-10-27 17:37:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:21,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:22,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:22,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:23,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:23,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 17:37:23,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:37:23,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1504 [2020-10-27 17:37:23,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:23,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:23,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 17:37:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 17:37:23,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:23,242 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:23,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:23,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:23,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:23,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:23,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:37:23,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:23,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:23,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:23,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:23,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 17:37:23,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 17:37:23,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 17:37:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:37:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:37:23,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312611820] [2020-10-27 17:37:23,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:23,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:37:23,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649472597] [2020-10-27 17:37:23,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:37:23,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:37:23,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:37:23,504 INFO L87 Difference]: Start difference. First operand 819 states and 1091 transitions. Second operand 5 states. [2020-10-27 17:37:24,301 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 17:37:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:26,504 INFO L93 Difference]: Finished difference Result 1657 states and 2215 transitions. [2020-10-27 17:37:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:37:26,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-27 17:37:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:26,513 INFO L225 Difference]: With dead ends: 1657 [2020-10-27 17:37:26,514 INFO L226 Difference]: Without dead ends: 827 [2020-10-27 17:37:26,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:37:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-10-27 17:37:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 819. [2020-10-27 17:37:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-10-27 17:37:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1085 transitions. [2020-10-27 17:37:26,553 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1085 transitions. Word has length 132 [2020-10-27 17:37:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:26,554 INFO L481 AbstractCegarLoop]: Abstraction has 819 states and 1085 transitions. [2020-10-27 17:37:26,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:37:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1085 transitions. [2020-10-27 17:37:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 17:37:26,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:26,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 17:37:26,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:37:26,559 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:26,559 INFO L82 PathProgramCache]: Analyzing trace with hash -637002316, now seen corresponding path program 1 times [2020-10-27 17:37:26,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:26,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923373067] [2020-10-27 17:37:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:27,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:27,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:27,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 17:37:27,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:37:27,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-27 17:37:27,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:27,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:27,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-27 17:37:27,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 17:37:27,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:28,102 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:28,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:28,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:28,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:28,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:28,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 17:37:28,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:28,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:28,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:28,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:28,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 17:37:28,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:28,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 17:37:28,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:28,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:28,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:28,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 17:37:28,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:37:28,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923373067] [2020-10-27 17:37:28,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:28,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:37:28,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131912020] [2020-10-27 17:37:28,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:37:28,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:28,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:37:28,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:37:28,384 INFO L87 Difference]: Start difference. First operand 819 states and 1085 transitions. Second operand 5 states. [2020-10-27 17:37:29,191 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 17:37:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:31,406 INFO L93 Difference]: Finished difference Result 1655 states and 2199 transitions. [2020-10-27 17:37:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:37:31,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2020-10-27 17:37:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:31,419 INFO L225 Difference]: With dead ends: 1655 [2020-10-27 17:37:31,420 INFO L226 Difference]: Without dead ends: 827 [2020-10-27 17:37:31,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:37:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-10-27 17:37:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 819. [2020-10-27 17:37:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-10-27 17:37:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1083 transitions. [2020-10-27 17:37:31,458 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1083 transitions. Word has length 136 [2020-10-27 17:37:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:31,458 INFO L481 AbstractCegarLoop]: Abstraction has 819 states and 1083 transitions. [2020-10-27 17:37:31,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:37:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1083 transitions. [2020-10-27 17:37:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 17:37:31,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:31,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 17:37:31,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 17:37:31,462 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash -839456208, now seen corresponding path program 1 times [2020-10-27 17:37:31,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:31,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536990358] [2020-10-27 17:37:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:32,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:32,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 17:37:32,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:37:32,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-27 17:37:32,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 17:37:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 17:37:32,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:37:32,780 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:32,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:32,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:32,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:32,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:32,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:37:32,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:32,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:32,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:32,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:32,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:32,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:32,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 17:37:32,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 17:37:32,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:32,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:32,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:32,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 17:37:32,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:37:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:37:33,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536990358] [2020-10-27 17:37:33,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:33,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:37:33,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393583479] [2020-10-27 17:37:33,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:37:33,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:37:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:37:33,046 INFO L87 Difference]: Start difference. First operand 819 states and 1083 transitions. Second operand 6 states. [2020-10-27 17:37:33,619 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 17:37:33,912 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:37:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:39,335 INFO L93 Difference]: Finished difference Result 2428 states and 3360 transitions. [2020-10-27 17:37:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 17:37:39,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2020-10-27 17:37:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:39,349 INFO L225 Difference]: With dead ends: 2428 [2020-10-27 17:37:39,349 INFO L226 Difference]: Without dead ends: 1615 [2020-10-27 17:37:39,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:37:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2020-10-27 17:37:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1393. [2020-10-27 17:37:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2020-10-27 17:37:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1915 transitions. [2020-10-27 17:37:39,403 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1915 transitions. Word has length 138 [2020-10-27 17:37:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:39,403 INFO L481 AbstractCegarLoop]: Abstraction has 1393 states and 1915 transitions. [2020-10-27 17:37:39,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:37:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1915 transitions. [2020-10-27 17:37:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 17:37:39,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:39,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 17:37:39,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 17:37:39,407 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:39,408 INFO L82 PathProgramCache]: Analyzing trace with hash 223050784, now seen corresponding path program 1 times [2020-10-27 17:37:39,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:39,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941684331] [2020-10-27 17:37:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:39,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:39,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:39,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 17:37:39,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:39,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-27 17:37:39,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:37:39,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:37:39,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 17:37:39,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:40,024 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:40,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:40,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:40,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:40,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:40,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 17:37:40,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:37:40,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:40,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:40,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:40,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:40,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:37:40,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 17:37:40,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:37:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:37:40,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:37:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:37:40,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941684331] [2020-10-27 17:37:40,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:37:40,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 17:37:40,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990771060] [2020-10-27 17:37:40,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:37:40,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:40,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:37:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:37:40,587 INFO L87 Difference]: Start difference. First operand 1393 states and 1915 transitions. Second operand 7 states. [2020-10-27 17:37:40,750 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 17:37:43,214 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 17:37:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:44,836 INFO L93 Difference]: Finished difference Result 3198 states and 4380 transitions. [2020-10-27 17:37:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 17:37:44,837 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2020-10-27 17:37:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:44,849 INFO L225 Difference]: With dead ends: 3198 [2020-10-27 17:37:44,849 INFO L226 Difference]: Without dead ends: 1811 [2020-10-27 17:37:44,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 17:37:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2020-10-27 17:37:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1611. [2020-10-27 17:37:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-10-27 17:37:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2181 transitions. [2020-10-27 17:37:44,922 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2181 transitions. Word has length 146 [2020-10-27 17:37:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:44,923 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2181 transitions. [2020-10-27 17:37:44,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:37:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2181 transitions. [2020-10-27 17:37:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-27 17:37:44,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:44,929 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, 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] [2020-10-27 17:37:44,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 17:37:44,930 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1318784086, now seen corresponding path program 1 times [2020-10-27 17:37:44,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:44,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892695263] [2020-10-27 17:37:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:45,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:45,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:46,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:46,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-27 17:37:46,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:37:46,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-10-27 17:37:46,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:46,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:46,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 17:37:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:37:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:46,924 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:46,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:46,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:46,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:46,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:46,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:37:46,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:46,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:46,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:46,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:47,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 17:37:47,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 17:37:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 17:37:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:47,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 17:37:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:47,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:47,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:47,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:37:47,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 17:37:47,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:37:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:37:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:37:47,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892695263] [2020-10-27 17:37:47,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:47,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:37:47,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365339948] [2020-10-27 17:37:47,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:37:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:37:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:37:47,848 INFO L87 Difference]: Start difference. First operand 1611 states and 2181 transitions. Second operand 7 states. [2020-10-27 17:37:48,949 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 17:37:50,994 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-27 17:37:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:37:53,177 INFO L93 Difference]: Finished difference Result 3505 states and 5089 transitions. [2020-10-27 17:37:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 17:37:53,178 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2020-10-27 17:37:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:37:53,193 INFO L225 Difference]: With dead ends: 3505 [2020-10-27 17:37:53,193 INFO L226 Difference]: Without dead ends: 2089 [2020-10-27 17:37:53,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 17:37:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-10-27 17:37:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2031. [2020-10-27 17:37:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2031 states. [2020-10-27 17:37:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2693 transitions. [2020-10-27 17:37:53,273 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2693 transitions. Word has length 262 [2020-10-27 17:37:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:37:53,274 INFO L481 AbstractCegarLoop]: Abstraction has 2031 states and 2693 transitions. [2020-10-27 17:37:53,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:37:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2693 transitions. [2020-10-27 17:37:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 17:37:53,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:37:53,281 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, 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] [2020-10-27 17:37:53,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 17:37:53,281 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:37:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:37:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash 326000066, now seen corresponding path program 1 times [2020-10-27 17:37:53,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:37:53,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672194801] [2020-10-27 17:37:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:37:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:53,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:55,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:55,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-27 17:37:55,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:37:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1765 [2020-10-27 17:37:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-27 17:37:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:37:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:55,326 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:37:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:37:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:55,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:55,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:37:55,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:55,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 17:37:55,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:37:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:37:55,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:55,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:37:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:55,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:55,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 17:37:55,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 17:37:55,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:37:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:37:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 17:37:55,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:55,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-27 17:37:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:37:55,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:37:55,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:37:55,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:37:55,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:37:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 17:37:55,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:37:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:37:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:37:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:37:55,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:37:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:37:55,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672194801] [2020-10-27 17:37:55,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:37:55,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:37:55,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781952553] [2020-10-27 17:37:55,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:37:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:37:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:37:55,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:37:55,988 INFO L87 Difference]: Start difference. First operand 2031 states and 2693 transitions. Second operand 7 states. [2020-10-27 17:37:56,167 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 17:37:58,681 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 17:38:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:01,034 INFO L93 Difference]: Finished difference Result 5447 states and 7492 transitions. [2020-10-27 17:38:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 17:38:01,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 272 [2020-10-27 17:38:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:01,054 INFO L225 Difference]: With dead ends: 5447 [2020-10-27 17:38:01,054 INFO L226 Difference]: Without dead ends: 3610 [2020-10-27 17:38:01,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:38:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-10-27 17:38:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3211. [2020-10-27 17:38:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3211 states. [2020-10-27 17:38:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 4149 transitions. [2020-10-27 17:38:01,164 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 4149 transitions. Word has length 272 [2020-10-27 17:38:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:01,165 INFO L481 AbstractCegarLoop]: Abstraction has 3211 states and 4149 transitions. [2020-10-27 17:38:01,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:38:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 4149 transitions. [2020-10-27 17:38:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 17:38:01,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:01,173 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:38:01,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 17:38:01,173 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash 263536153, now seen corresponding path program 1 times [2020-10-27 17:38:01,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:01,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539909307] [2020-10-27 17:38:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:01,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:01,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:02,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:02,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:02,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-27 17:38:02,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:38:02,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-27 17:38:02,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 232 [2020-10-27 17:38:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 17:38:02,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:02,820 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:38:02,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:02,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:02,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:02,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:02,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:38:02,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:02,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:02,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:02,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:02,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:02,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:38:02,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:02,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 17:38:02,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:02,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:03,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 17:38:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:03,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:03,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:03,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 17:38:03,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:03,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 17:38:03,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 17:38:03,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-27 17:38:03,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539909307] [2020-10-27 17:38:03,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:03,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:38:03,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968459457] [2020-10-27 17:38:03,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:38:03,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:38:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:38:03,281 INFO L87 Difference]: Start difference. First operand 3211 states and 4149 transitions. Second operand 5 states. [2020-10-27 17:38:03,442 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:38:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:07,180 INFO L93 Difference]: Finished difference Result 7200 states and 9669 transitions. [2020-10-27 17:38:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:38:07,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 272 [2020-10-27 17:38:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:07,209 INFO L225 Difference]: With dead ends: 7200 [2020-10-27 17:38:07,209 INFO L226 Difference]: Without dead ends: 4183 [2020-10-27 17:38:07,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:38:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2020-10-27 17:38:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 3793. [2020-10-27 17:38:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3793 states. [2020-10-27 17:38:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 4921 transitions. [2020-10-27 17:38:07,337 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 4921 transitions. Word has length 272 [2020-10-27 17:38:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:07,338 INFO L481 AbstractCegarLoop]: Abstraction has 3793 states and 4921 transitions. [2020-10-27 17:38:07,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:38:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 4921 transitions. [2020-10-27 17:38:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-27 17:38:07,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:07,347 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:38:07,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 17:38:07,347 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1962726101, now seen corresponding path program 1 times [2020-10-27 17:38:07,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:07,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55552412] [2020-10-27 17:38:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:07,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:07,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:08,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:10,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:10,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-27 17:38:10,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:38:10,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-27 17:38:10,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 234 [2020-10-27 17:38:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 17:38:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:10,395 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:38:10,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:10,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:10,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:10,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:10,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 17:38:10,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:10,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:10,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:10,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:10,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:38:10,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:10,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 17:38:10,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:10,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:10,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 17:38:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:10,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:10,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:10,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 17:38:10,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:10,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 17:38:10,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:10,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:10,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:10,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 17:38:10,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-27 17:38:10,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55552412] [2020-10-27 17:38:10,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:10,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:38:10,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767087207] [2020-10-27 17:38:10,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:38:10,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:10,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:38:10,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:38:10,681 INFO L87 Difference]: Start difference. First operand 3793 states and 4921 transitions. Second operand 5 states. [2020-10-27 17:38:12,201 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 17:38:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:15,083 INFO L93 Difference]: Finished difference Result 8358 states and 11218 transitions. [2020-10-27 17:38:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:38:15,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2020-10-27 17:38:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:15,116 INFO L225 Difference]: With dead ends: 8358 [2020-10-27 17:38:15,116 INFO L226 Difference]: Without dead ends: 4569 [2020-10-27 17:38:15,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:38:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2020-10-27 17:38:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4561. [2020-10-27 17:38:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4561 states. [2020-10-27 17:38:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 5970 transitions. [2020-10-27 17:38:15,260 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 5970 transitions. Word has length 274 [2020-10-27 17:38:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:15,261 INFO L481 AbstractCegarLoop]: Abstraction has 4561 states and 5970 transitions. [2020-10-27 17:38:15,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:38:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 5970 transitions. [2020-10-27 17:38:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-27 17:38:15,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:15,270 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, 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] [2020-10-27 17:38:15,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 17:38:15,270 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:15,271 INFO L82 PathProgramCache]: Analyzing trace with hash 855821683, now seen corresponding path program 1 times [2020-10-27 17:38:15,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:15,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516739709] [2020-10-27 17:38:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:15,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:15,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:15,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-27 17:38:15,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:15,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-27 17:38:15,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:15,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:15,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-27 17:38:15,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 17:38:15,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:16,086 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:38:16,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:16,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:16,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:16,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:16,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 17:38:16,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:16,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:16,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:16,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:16,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:38:16,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:16,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 17:38:16,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:16,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-27 17:38:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:16,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 17:38:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:16,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:38:16,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:38:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:38:16,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516739709] [2020-10-27 17:38:16,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:16,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:38:16,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741067047] [2020-10-27 17:38:16,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:38:16,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:38:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:38:16,607 INFO L87 Difference]: Start difference. First operand 4561 states and 5970 transitions. Second operand 7 states. [2020-10-27 17:38:17,779 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 17:38:18,037 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 17:38:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:22,641 INFO L93 Difference]: Finished difference Result 9543 states and 12676 transitions. [2020-10-27 17:38:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 17:38:22,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 277 [2020-10-27 17:38:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:22,673 INFO L225 Difference]: With dead ends: 9543 [2020-10-27 17:38:22,674 INFO L226 Difference]: Without dead ends: 5176 [2020-10-27 17:38:22,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:38:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2020-10-27 17:38:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4969. [2020-10-27 17:38:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4969 states. [2020-10-27 17:38:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 6511 transitions. [2020-10-27 17:38:22,827 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 6511 transitions. Word has length 277 [2020-10-27 17:38:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:22,827 INFO L481 AbstractCegarLoop]: Abstraction has 4969 states and 6511 transitions. [2020-10-27 17:38:22,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:38:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 6511 transitions. [2020-10-27 17:38:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-27 17:38:22,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:22,837 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, 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] [2020-10-27 17:38:22,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 17:38:22,837 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash 928662270, now seen corresponding path program 1 times [2020-10-27 17:38:22,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:22,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800958015] [2020-10-27 17:38:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:22,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:24,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:24,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-27 17:38:24,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:38:24,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-27 17:38:24,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:24,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:24,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 17:38:24,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:38:24,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:24,337 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:38:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:24,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:24,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:24,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:24,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:24,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:38:24,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:24,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:24,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:24,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:24,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:38:24,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:24,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:24,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:24,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 17:38:24,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:24,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 17:38:24,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-27 17:38:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:24,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-27 17:38:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:24,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:24,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:24,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:38:24,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-27 17:38:24,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:38:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:38:24,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:38:25,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800958015] [2020-10-27 17:38:25,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:25,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:38:25,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244229004] [2020-10-27 17:38:25,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:38:25,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:38:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:38:25,199 INFO L87 Difference]: Start difference. First operand 4969 states and 6511 transitions. Second operand 7 states. [2020-10-27 17:38:26,534 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 17:38:27,026 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-27 17:38:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:31,689 INFO L93 Difference]: Finished difference Result 10862 states and 14805 transitions. [2020-10-27 17:38:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 17:38:31,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 293 [2020-10-27 17:38:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:31,726 INFO L225 Difference]: With dead ends: 10862 [2020-10-27 17:38:31,726 INFO L226 Difference]: Without dead ends: 6087 [2020-10-27 17:38:31,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:38:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6087 states. [2020-10-27 17:38:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6087 to 5967. [2020-10-27 17:38:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5967 states. [2020-10-27 17:38:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5967 states to 5967 states and 7649 transitions. [2020-10-27 17:38:31,985 INFO L78 Accepts]: Start accepts. Automaton has 5967 states and 7649 transitions. Word has length 293 [2020-10-27 17:38:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:31,986 INFO L481 AbstractCegarLoop]: Abstraction has 5967 states and 7649 transitions. [2020-10-27 17:38:31,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:38:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5967 states and 7649 transitions. [2020-10-27 17:38:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-27 17:38:31,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:31,993 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, 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, 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] [2020-10-27 17:38:31,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 17:38:31,994 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash -999545978, now seen corresponding path program 1 times [2020-10-27 17:38:31,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:31,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391010913] [2020-10-27 17:38:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:32,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:32,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 17:38:32,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:32,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 17:38:32,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:32,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:32,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-27 17:38:32,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 17:38:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:32,650 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:38:32,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:32,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:32,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:32,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:32,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:32,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:32,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 17:38:32,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 17:38:32,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:32,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 17:38:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:32,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:32,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:32,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:38:32,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 17:38:32,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 17:38:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-27 17:38:33,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391010913] [2020-10-27 17:38:33,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:33,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:38:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563692858] [2020-10-27 17:38:33,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:38:33,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:38:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:38:33,051 INFO L87 Difference]: Start difference. First operand 5967 states and 7649 transitions. Second operand 6 states. [2020-10-27 17:38:34,345 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:38:35,998 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 17:38:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:39,187 INFO L93 Difference]: Finished difference Result 14216 states and 19199 transitions. [2020-10-27 17:38:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 17:38:39,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 299 [2020-10-27 17:38:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:39,221 INFO L225 Difference]: With dead ends: 14216 [2020-10-27 17:38:39,222 INFO L226 Difference]: Without dead ends: 8670 [2020-10-27 17:38:39,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:38:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2020-10-27 17:38:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 7887. [2020-10-27 17:38:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7887 states. [2020-10-27 17:38:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7887 states to 7887 states and 10413 transitions. [2020-10-27 17:38:39,499 INFO L78 Accepts]: Start accepts. Automaton has 7887 states and 10413 transitions. Word has length 299 [2020-10-27 17:38:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:39,500 INFO L481 AbstractCegarLoop]: Abstraction has 7887 states and 10413 transitions. [2020-10-27 17:38:39,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:38:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7887 states and 10413 transitions. [2020-10-27 17:38:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-27 17:38:39,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:39,512 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, 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] [2020-10-27 17:38:39,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 17:38:39,512 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash 676705855, now seen corresponding path program 1 times [2020-10-27 17:38:39,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:39,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354736853] [2020-10-27 17:38:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:39,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:42,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:42,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-27 17:38:42,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:38:42,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3148 [2020-10-27 17:38:42,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:42,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 17:38:42,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 17:38:42,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 17:38:42,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:42,968 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:38:42,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:42,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:42,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:42,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 17:38:42,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:42,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:42,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:42,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:43,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:43,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:43,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-27 17:38:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:43,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-27 17:38:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:43,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:43,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:38:43,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 17:38:43,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 17:38:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:38:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:38:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 137 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:38:43,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354736853] [2020-10-27 17:38:43,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:43,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 17:38:43,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176473719] [2020-10-27 17:38:43,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 17:38:43,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 17:38:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:38:43,487 INFO L87 Difference]: Start difference. First operand 7887 states and 10413 transitions. Second operand 8 states. [2020-10-27 17:38:43,668 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:38:45,905 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 17:38:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:51,007 INFO L93 Difference]: Finished difference Result 23292 states and 32894 transitions. [2020-10-27 17:38:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 17:38:51,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 305 [2020-10-27 17:38:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:51,101 INFO L225 Difference]: With dead ends: 23292 [2020-10-27 17:38:51,101 INFO L226 Difference]: Without dead ends: 16207 [2020-10-27 17:38:51,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 17:38:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16207 states. [2020-10-27 17:38:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16207 to 15353. [2020-10-27 17:38:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15353 states. [2020-10-27 17:38:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15353 states to 15353 states and 20578 transitions. [2020-10-27 17:38:51,648 INFO L78 Accepts]: Start accepts. Automaton has 15353 states and 20578 transitions. Word has length 305 [2020-10-27 17:38:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:51,649 INFO L481 AbstractCegarLoop]: Abstraction has 15353 states and 20578 transitions. [2020-10-27 17:38:51,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 17:38:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15353 states and 20578 transitions. [2020-10-27 17:38:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 17:38:51,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:51,658 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, 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, 1] [2020-10-27 17:38:51,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 17:38:51,659 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash -334227081, now seen corresponding path program 1 times [2020-10-27 17:38:51,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:51,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63926541] [2020-10-27 17:38:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:51,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:54,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-27 17:38:54,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:38:54,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2809 [2020-10-27 17:38:54,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-10-27 17:38:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:38:54,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:54,725 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:38:54,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:54,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:54,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:54,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:54,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 17:38:54,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:54,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:54,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:54,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:54,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:54,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:54,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 17:38:54,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:54,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 17:38:54,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:54,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:54,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:54,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 17:38:54,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:54,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-10-27 17:38:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:54,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:55,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:55,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:38:55,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:55,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-27 17:38:55,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:38:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:38:55,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:38:55,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63926541] [2020-10-27 17:38:55,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:55,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:38:55,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869692637] [2020-10-27 17:38:55,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:38:55,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:38:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:38:55,262 INFO L87 Difference]: Start difference. First operand 15353 states and 20578 transitions. Second operand 7 states. [2020-10-27 17:38:55,450 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 17:38:57,946 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 17:39:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:00,645 INFO L93 Difference]: Finished difference Result 32117 states and 43808 transitions. [2020-10-27 17:39:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 17:39:00,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 309 [2020-10-27 17:39:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:00,708 INFO L225 Difference]: With dead ends: 32117 [2020-10-27 17:39:00,708 INFO L226 Difference]: Without dead ends: 16964 [2020-10-27 17:39:00,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:39:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16964 states. [2020-10-27 17:39:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16964 to 16885. [2020-10-27 17:39:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16885 states. [2020-10-27 17:39:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16885 states to 16885 states and 22061 transitions. [2020-10-27 17:39:01,157 INFO L78 Accepts]: Start accepts. Automaton has 16885 states and 22061 transitions. Word has length 309 [2020-10-27 17:39:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:01,157 INFO L481 AbstractCegarLoop]: Abstraction has 16885 states and 22061 transitions. [2020-10-27 17:39:01,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:39:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 16885 states and 22061 transitions. [2020-10-27 17:39:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-27 17:39:01,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:01,173 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:39:01,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 17:39:01,173 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1241552481, now seen corresponding path program 1 times [2020-10-27 17:39:01,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:01,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975430152] [2020-10-27 17:39:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:01,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:01,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:01,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:02,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:02,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:05,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:05,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-27 17:39:05,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 17:39:05,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4161 [2020-10-27 17:39:05,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:05,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:05,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 314 [2020-10-27 17:39:05,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:39:05,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:05,591 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:39:05,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:05,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:05,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:05,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:39:05,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:05,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:05,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:05,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:05,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:05,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:05,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:05,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:39:05,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 17:39:05,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:05,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 17:39:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:05,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:05,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:05,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 17:39:05,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:05,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 17:39:05,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:05,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:05,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:05,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:05,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:05,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 17:39:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:05,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:05,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 17:39:05,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 17:39:05,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 17:39:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:39:05,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-10-27 17:39:06,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975430152] [2020-10-27 17:39:06,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:39:06,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 17:39:06,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276952445] [2020-10-27 17:39:06,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:39:06,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:39:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:39:06,028 INFO L87 Difference]: Start difference. First operand 16885 states and 22061 transitions. Second operand 5 states. [2020-10-27 17:39:06,215 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:39:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:10,749 INFO L93 Difference]: Finished difference Result 36240 states and 47589 transitions. [2020-10-27 17:39:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:39:10,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 354 [2020-10-27 17:39:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:10,819 INFO L225 Difference]: With dead ends: 36240 [2020-10-27 17:39:10,819 INFO L226 Difference]: Without dead ends: 19739 [2020-10-27 17:39:10,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:39:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19739 states. [2020-10-27 17:39:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19739 to 18954. [2020-10-27 17:39:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18954 states. [2020-10-27 17:39:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18954 states to 18954 states and 24119 transitions. [2020-10-27 17:39:11,376 INFO L78 Accepts]: Start accepts. Automaton has 18954 states and 24119 transitions. Word has length 354 [2020-10-27 17:39:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:11,377 INFO L481 AbstractCegarLoop]: Abstraction has 18954 states and 24119 transitions. [2020-10-27 17:39:11,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:39:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 18954 states and 24119 transitions. [2020-10-27 17:39:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-10-27 17:39:11,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:11,394 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, 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, 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] [2020-10-27 17:39:11,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 17:39:11,394 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:11,398 INFO L82 PathProgramCache]: Analyzing trace with hash -865699369, now seen corresponding path program 1 times [2020-10-27 17:39:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:11,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902280130] [2020-10-27 17:39:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:11,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:12,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:12,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-27 17:39:12,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-27 17:39:12,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-10-27 17:39:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 17:39:12,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:12,260 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:39:12,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:12,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:12,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:12,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:12,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 17:39:12,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:12,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:12,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:12,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:12,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:39:12,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:12,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 17:39:12,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:12,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:12,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 17:39:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:12,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-27 17:39:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-27 17:39:12,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902280130] [2020-10-27 17:39:12,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:39:12,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:39:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564693344] [2020-10-27 17:39:12,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:39:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:12,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:39:12,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:39:12,652 INFO L87 Difference]: Start difference. First operand 18954 states and 24119 transitions. Second operand 5 states. [2020-10-27 17:39:12,832 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:39:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:17,777 INFO L93 Difference]: Finished difference Result 41763 states and 53493 transitions. [2020-10-27 17:39:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:39:17,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 358 [2020-10-27 17:39:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:17,870 INFO L225 Difference]: With dead ends: 41763 [2020-10-27 17:39:17,871 INFO L226 Difference]: Without dead ends: 23193 [2020-10-27 17:39:17,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:39:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23193 states. [2020-10-27 17:39:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23193 to 22781. [2020-10-27 17:39:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22781 states. [2020-10-27 17:39:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22781 states to 22781 states and 28973 transitions. [2020-10-27 17:39:18,517 INFO L78 Accepts]: Start accepts. Automaton has 22781 states and 28973 transitions. Word has length 358 [2020-10-27 17:39:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:18,517 INFO L481 AbstractCegarLoop]: Abstraction has 22781 states and 28973 transitions. [2020-10-27 17:39:18,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:39:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 22781 states and 28973 transitions. [2020-10-27 17:39:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-10-27 17:39:18,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:18,546 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:39:18,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 17:39:18,547 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:18,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:18,547 INFO L82 PathProgramCache]: Analyzing trace with hash -551005088, now seen corresponding path program 1 times [2020-10-27 17:39:18,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:18,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898002262] [2020-10-27 17:39:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:18,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:18,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:20,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:20,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-27 17:39:20,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:39:20,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-10-27 17:39:20,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 251 [2020-10-27 17:39:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:39:20,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:20,970 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:39:20,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:20,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:20,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:20,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:20,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:20,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 17:39:20,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:20,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:21,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:21,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:21,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 17:39:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:21,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:21,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:21,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 17:39:21,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:21,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 17:39:21,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 17:39:21,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:21,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 17:39:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:39:21,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:39:21,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 319 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-10-27 17:39:21,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898002262] [2020-10-27 17:39:21,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:39:21,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:39:21,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469945789] [2020-10-27 17:39:21,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:39:21,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:21,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:39:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:39:21,572 INFO L87 Difference]: Start difference. First operand 22781 states and 28973 transitions. Second operand 7 states. [2020-10-27 17:39:23,607 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:39:23,894 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 17:39:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:27,664 INFO L93 Difference]: Finished difference Result 45460 states and 57843 transitions. [2020-10-27 17:39:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 17:39:27,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 385 [2020-10-27 17:39:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:27,760 INFO L225 Difference]: With dead ends: 45460 [2020-10-27 17:39:27,760 INFO L226 Difference]: Without dead ends: 23063 [2020-10-27 17:39:27,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:39:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23063 states. [2020-10-27 17:39:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23063 to 22261. [2020-10-27 17:39:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22261 states. [2020-10-27 17:39:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22261 states to 22261 states and 27080 transitions. [2020-10-27 17:39:28,666 INFO L78 Accepts]: Start accepts. Automaton has 22261 states and 27080 transitions. Word has length 385 [2020-10-27 17:39:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:28,667 INFO L481 AbstractCegarLoop]: Abstraction has 22261 states and 27080 transitions. [2020-10-27 17:39:28,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:39:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22261 states and 27080 transitions. [2020-10-27 17:39:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-27 17:39:28,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:28,719 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:39:28,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 17:39:28,720 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1079053525, now seen corresponding path program 1 times [2020-10-27 17:39:28,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:28,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700380422] [2020-10-27 17:39:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:28,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:29,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:30,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:32,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:32,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:33,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 442 [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 387 [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 17:39:33,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:34,102 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:39:34,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:34,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:34,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:34,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:34,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:39:34,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:34,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:34,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:34,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:34,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:34,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-27 17:39:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:34,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:34,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:34,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 17:39:34,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:34,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 17:39:34,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:34,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:34,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:34,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:34,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:34,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-27 17:39:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:34,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:34,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:34,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 17:39:34,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:34,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 17:39:34,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-27 17:39:34,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-10-27 17:39:34,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700380422] [2020-10-27 17:39:34,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:39:34,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:39:34,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45366176] [2020-10-27 17:39:34,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:39:34,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:34,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:39:34,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:39:34,665 INFO L87 Difference]: Start difference. First operand 22261 states and 27080 transitions. Second operand 6 states. [2020-10-27 17:39:34,852 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:39:37,408 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:39:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:41,326 INFO L93 Difference]: Finished difference Result 49697 states and 60695 transitions. [2020-10-27 17:39:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 17:39:41,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 426 [2020-10-27 17:39:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:41,415 INFO L225 Difference]: With dead ends: 49697 [2020-10-27 17:39:41,415 INFO L226 Difference]: Without dead ends: 27820 [2020-10-27 17:39:41,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:39:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27820 states. [2020-10-27 17:39:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27820 to 23986. [2020-10-27 17:39:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23986 states. [2020-10-27 17:39:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23986 states to 23986 states and 29265 transitions. [2020-10-27 17:39:41,975 INFO L78 Accepts]: Start accepts. Automaton has 23986 states and 29265 transitions. Word has length 426 [2020-10-27 17:39:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:41,976 INFO L481 AbstractCegarLoop]: Abstraction has 23986 states and 29265 transitions. [2020-10-27 17:39:41,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:39:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 23986 states and 29265 transitions. [2020-10-27 17:39:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-10-27 17:39:42,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:42,011 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-10-27 17:39:42,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 17:39:42,012 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash 588394165, now seen corresponding path program 1 times [2020-10-27 17:39:42,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:42,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825017656] [2020-10-27 17:39:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:42,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:42,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:47,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:47,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 453 [2020-10-27 17:39:47,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:39:47,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4972 [2020-10-27 17:39:47,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 303 [2020-10-27 17:39:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:39:47,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:47,338 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:39:47,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:47,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:47,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:47,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:47,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:39:47,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:47,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:47,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:47,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:47,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:47,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 17:39:47,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:47,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 17:39:47,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:47,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-27 17:39:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:47,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:47,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 17:39:47,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:47,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 17:39:47,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:47,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-27 17:39:47,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:47,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2020-10-27 17:39:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:47,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:47,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:47,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:39:47,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 17:39:47,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:39:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:39:47,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 319 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-10-27 17:39:48,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825017656] [2020-10-27 17:39:48,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:39:48,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:39:48,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811910707] [2020-10-27 17:39:48,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:39:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:39:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:39:48,667 INFO L87 Difference]: Start difference. First operand 23986 states and 29265 transitions. Second operand 7 states. [2020-10-27 17:39:50,290 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 17:39:51,932 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 17:39:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:54,553 INFO L93 Difference]: Finished difference Result 48422 states and 59168 transitions. [2020-10-27 17:39:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 17:39:54,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 437 [2020-10-27 17:39:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:54,654 INFO L225 Difference]: With dead ends: 48422 [2020-10-27 17:39:54,654 INFO L226 Difference]: Without dead ends: 24436 [2020-10-27 17:39:54,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 17:39:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24436 states. [2020-10-27 17:39:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24436 to 23790. [2020-10-27 17:39:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23790 states. [2020-10-27 17:39:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23790 states to 23790 states and 28678 transitions. [2020-10-27 17:39:55,312 INFO L78 Accepts]: Start accepts. Automaton has 23790 states and 28678 transitions. Word has length 437 [2020-10-27 17:39:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:55,313 INFO L481 AbstractCegarLoop]: Abstraction has 23790 states and 28678 transitions. [2020-10-27 17:39:55,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:39:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 23790 states and 28678 transitions. [2020-10-27 17:39:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-10-27 17:39:55,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:55,344 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2020-10-27 17:39:55,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 17:39:55,345 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:55,345 INFO L82 PathProgramCache]: Analyzing trace with hash 285574498, now seen corresponding path program 1 times [2020-10-27 17:39:55,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:55,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775635893] [2020-10-27 17:39:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:55,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:55,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:00,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:00,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 475 [2020-10-27 17:40:00,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:40:00,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 17:40:00,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:00,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 17:40:00,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 325 [2020-10-27 17:40:00,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 17:40:00,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:00,843 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:40:00,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:40:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:00,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:00,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:40:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:00,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:40:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:00,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:00,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:00,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 17:40:00,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:00,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 17:40:00,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:40:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:00,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:40:00,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:00,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-27 17:40:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:01,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:01,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-27 17:40:01,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:01,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-10-27 17:40:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:01,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:01,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:01,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:40:01,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:40:01,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 17:40:01,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 17:40:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:40:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:40:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:02,114 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-27 17:40:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 319 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-27 17:40:02,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775635893] [2020-10-27 17:40:02,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:40:02,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 17:40:02,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628853665] [2020-10-27 17:40:02,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 17:40:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:40:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 17:40:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 17:40:02,946 INFO L87 Difference]: Start difference. First operand 23790 states and 28678 transitions. Second operand 10 states. [2020-10-27 17:40:03,621 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-27 17:40:04,275 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-27 17:40:04,856 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-27 17:40:05,354 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2020-10-27 17:40:06,066 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-27 17:40:08,384 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2020-10-27 17:40:09,179 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 17:40:09,527 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 17:40:10,350 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-27 17:40:11,299 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-27 17:40:12,093 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-27 17:40:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:40:12,981 INFO L93 Difference]: Finished difference Result 47813 states and 57731 transitions. [2020-10-27 17:40:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 17:40:12,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 459 [2020-10-27 17:40:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:40:13,055 INFO L225 Difference]: With dead ends: 47813 [2020-10-27 17:40:13,055 INFO L226 Difference]: Without dead ends: 24299 [2020-10-27 17:40:13,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-27 17:40:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24299 states. [2020-10-27 17:40:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24299 to 23412. [2020-10-27 17:40:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23412 states. [2020-10-27 17:40:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23412 states to 23412 states and 28061 transitions. [2020-10-27 17:40:13,592 INFO L78 Accepts]: Start accepts. Automaton has 23412 states and 28061 transitions. Word has length 459 [2020-10-27 17:40:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:40:13,593 INFO L481 AbstractCegarLoop]: Abstraction has 23412 states and 28061 transitions. [2020-10-27 17:40:13,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 17:40:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23412 states and 28061 transitions. [2020-10-27 17:40:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-27 17:40:13,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:40:13,615 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-27 17:40:13,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 17:40:13,616 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:40:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:40:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1267851117, now seen corresponding path program 1 times [2020-10-27 17:40:13,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:40:13,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800597926] [2020-10-27 17:40:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:40:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:13,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:13,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:14,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:16,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 493 [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 343 [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:40:16,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:16,308 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 17:40:16,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:40:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:16,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:16,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:40:16,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:16,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 17:40:16,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:16,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:40:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:40:16,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:40:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:16,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:16,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:16,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:40:16,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:16,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 17:40:16,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:16,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:40:16,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:16,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:40:16,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-27 17:40:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:16,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:16,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:16,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 17:40:16,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:16,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 17:40:16,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:40:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:40:16,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:16,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-10-27 17:40:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:16,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:16,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:16,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 17:40:16,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:16,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 17:40:16,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:16,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:40:16,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:16,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 17:40:16,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:16,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-10-27 17:40:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:16,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:16,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:16,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 17:40:16,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:16,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 17:40:16,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:40:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:40:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 17:40:16,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 456 proven. 2 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-10-27 17:40:17,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800597926] [2020-10-27 17:40:17,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:40:17,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:40:17,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548554948] [2020-10-27 17:40:17,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:40:17,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:40:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:40:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:40:17,413 INFO L87 Difference]: Start difference. First operand 23412 states and 28061 transitions. Second operand 7 states. [2020-10-27 17:40:18,788 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 17:40:20,051 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 17:40:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:40:23,234 INFO L93 Difference]: Finished difference Result 48218 states and 58087 transitions. [2020-10-27 17:40:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 17:40:23,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 475 [2020-10-27 17:40:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:40:23,340 INFO L225 Difference]: With dead ends: 48218 [2020-10-27 17:40:23,341 INFO L226 Difference]: Without dead ends: 25190 [2020-10-27 17:40:23,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 17:40:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25190 states. [2020-10-27 17:40:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25190 to 24940. [2020-10-27 17:40:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24940 states. [2020-10-27 17:40:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24940 states to 24940 states and 29902 transitions. [2020-10-27 17:40:24,030 INFO L78 Accepts]: Start accepts. Automaton has 24940 states and 29902 transitions. Word has length 475 [2020-10-27 17:40:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:40:24,031 INFO L481 AbstractCegarLoop]: Abstraction has 24940 states and 29902 transitions. [2020-10-27 17:40:24,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:40:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24940 states and 29902 transitions. [2020-10-27 17:40:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-27 17:40:24,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:40:24,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:40:24,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 17:40:24,066 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:40:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:40:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1443632859, now seen corresponding path program 1 times [2020-10-27 17:40:24,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:40:24,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112921497] [2020-10-27 17:40:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:40:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:24,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:24,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking...