/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:38:50,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:38:50,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:38:50,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:38:50,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:38:50,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:38:50,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:38:50,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:38:50,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:38:50,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:38:50,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:38:50,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:38:50,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:38:50,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:38:50,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:38:50,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:38:50,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:38:50,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:38:50,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:38:50,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:38:50,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:38:50,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:38:50,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:38:50,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:38:50,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:38:50,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:38:50,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:38:50,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:38:50,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:38:50,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:38:50,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:38:50,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:38:50,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:38:50,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:38:50,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:38:50,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:38:50,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:38:50,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:38:50,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:38:50,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:38:50,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:38:50,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:38:50,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:38:50,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:38:50,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:38:50,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:38:50,759 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:38:50,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:38:50,759 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:38:50,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:38:50,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:38:50,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:38:50,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:38:50,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:38:50,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:38:50,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:38:50,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:38:50,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:38:50,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:38:50,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:38:50,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:38:50,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:38:50,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:38:50,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:38:50,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:38:50,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:38:50,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:38:50,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:38:50,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:38:50,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:38:50,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:38:50,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:38:51,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:38:51,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:38:51,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:38:51,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:38:51,269 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:38:51,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19.c [2020-10-26 23:38:51,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb80511db/f2a2531a913341bfb7d95db5d32f398b/FLAG23731d238 [2020-10-26 23:38:52,209 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:38:52,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label19.c [2020-10-26 23:38:52,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb80511db/f2a2531a913341bfb7d95db5d32f398b/FLAG23731d238 [2020-10-26 23:38:52,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb80511db/f2a2531a913341bfb7d95db5d32f398b [2020-10-26 23:38:52,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:38:52,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:38:52,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:38:52,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:38:52,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:38:52,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:38:52" (1/1) ... [2020-10-26 23:38:52,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33af22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:52, skipping insertion in model container [2020-10-26 23:38:52,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:38:52" (1/1) ... [2020-10-26 23:38:52,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:38:52,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:38:53,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:38:53,422 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:38:53,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:38:53,731 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:38:53,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53 WrapperNode [2020-10-26 23:38:53,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:38:53,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:38:53,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:38:53,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:38:53,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... [2020-10-26 23:38:53,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... [2020-10-26 23:38:53,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... [2020-10-26 23:38:53,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... [2020-10-26 23:38:53,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... [2020-10-26 23:38:53,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... [2020-10-26 23:38:54,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... [2020-10-26 23:38:54,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:38:54,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:38:54,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:38:54,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:38:54,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:38:54,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:38:54,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:38:54,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:38:54,098 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:38:54,098 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:38:54,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:38:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:38:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:38:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:38:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:38:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:38:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:38:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:38:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:38:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:38:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:38:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:38:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:38:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:38:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:38:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:38:57,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:38:57,966 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:38:57,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:38:57 BoogieIcfgContainer [2020-10-26 23:38:57,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:38:57,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:38:57,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:38:57,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:38:57,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:38:52" (1/3) ... [2020-10-26 23:38:57,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f79605c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:38:57, skipping insertion in model container [2020-10-26 23:38:57,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:38:53" (2/3) ... [2020-10-26 23:38:57,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f79605c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:38:57, skipping insertion in model container [2020-10-26 23:38:57,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:38:57" (3/3) ... [2020-10-26 23:38:57,979 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label19.c [2020-10-26 23:38:57,992 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:38:58,000 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:38:58,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:38:58,049 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:38:58,050 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:38:58,050 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:38:58,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:38:58,050 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:38:58,050 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:38:58,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:38:58,051 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:38:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:38:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 23:38:58,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:58,095 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] [2020-10-26 23:38:58,096 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:58,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2026005569, now seen corresponding path program 1 times [2020-10-26 23:38:58,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:58,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072806510] [2020-10-26 23:38:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:58,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:58,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 23:38:58,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:58,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-26 23:38:58,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:59,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:38:59,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:38:59,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 23:38:59,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:38:59,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:59,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:59,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:59,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 23:38:59,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:38:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:38:59,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072806510] [2020-10-26 23:38:59,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:38:59,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:38:59,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203117418] [2020-10-26 23:38:59,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:38:59,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:38:59,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:38:59,351 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:39:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:08,690 INFO L93 Difference]: Finished difference Result 1204 states and 2170 transitions. [2020-10-26 23:39:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:39:08,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-26 23:39:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:08,713 INFO L225 Difference]: With dead ends: 1204 [2020-10-26 23:39:08,713 INFO L226 Difference]: Without dead ends: 698 [2020-10-26 23:39:08,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:39:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-26 23:39:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 692. [2020-10-26 23:39:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-10-26 23:39:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1013 transitions. [2020-10-26 23:39:08,914 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1013 transitions. Word has length 52 [2020-10-26 23:39:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:08,915 INFO L481 AbstractCegarLoop]: Abstraction has 692 states and 1013 transitions. [2020-10-26 23:39:08,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:39:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1013 transitions. [2020-10-26 23:39:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 23:39:08,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:08,923 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] [2020-10-26 23:39:08,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:39:08,924 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -439716042, now seen corresponding path program 1 times [2020-10-26 23:39:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:08,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134268050] [2020-10-26 23:39:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:10,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:11,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:11,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 23:39:11,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:39:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2960 [2020-10-26 23:39:11,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:39:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:39:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:39:11,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:39:12,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:12,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:12,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:12,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:12,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:12,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:39:12,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:39:12,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:12,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:12,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:12,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:12,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:39:12,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:12,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 23:39:12,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:12,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:12,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:12,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:39:12,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:39:12,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134268050] [2020-10-26 23:39:12,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:39:12,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:39:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084379439] [2020-10-26 23:39:12,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:12,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:12,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:12,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:12,405 INFO L87 Difference]: Start difference. First operand 692 states and 1013 transitions. Second operand 7 states. [2020-10-26 23:39:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:21,085 INFO L93 Difference]: Finished difference Result 1712 states and 2419 transitions. [2020-10-26 23:39:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:39:21,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-26 23:39:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:21,098 INFO L225 Difference]: With dead ends: 1712 [2020-10-26 23:39:21,098 INFO L226 Difference]: Without dead ends: 1026 [2020-10-26 23:39:21,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:39:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-10-26 23:39:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1015. [2020-10-26 23:39:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-26 23:39:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1368 transitions. [2020-10-26 23:39:21,151 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1368 transitions. Word has length 121 [2020-10-26 23:39:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:21,152 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1368 transitions. [2020-10-26 23:39:21,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:39:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1368 transitions. [2020-10-26 23:39:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 23:39:21,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:21,155 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] [2020-10-26 23:39:21,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:39:21,155 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash 429496498, now seen corresponding path program 1 times [2020-10-26 23:39:21,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:21,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978654945] [2020-10-26 23:39:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:21,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:22,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:22,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:22,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 23:39:22,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:39:22,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-26 23:39:22,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:39:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:39:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:39:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:22,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:22,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:22,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:22,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 23:39:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:39:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:22,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:22,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:23,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:23,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 23:39:23,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:23,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 23:39:23,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:23,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:23,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:39:23,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:39:23,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978654945] [2020-10-26 23:39:23,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:39:23,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:39:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407743801] [2020-10-26 23:39:23,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:39:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:39:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:39:23,198 INFO L87 Difference]: Start difference. First operand 1015 states and 1368 transitions. Second operand 8 states. [2020-10-26 23:39:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:37,535 INFO L93 Difference]: Finished difference Result 3021 states and 4376 transitions. [2020-10-26 23:39:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:39:37,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 126 [2020-10-26 23:39:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:37,557 INFO L225 Difference]: With dead ends: 3021 [2020-10-26 23:39:37,557 INFO L226 Difference]: Without dead ends: 2319 [2020-10-26 23:39:37,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:39:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2020-10-26 23:39:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1982. [2020-10-26 23:39:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1982 states. [2020-10-26 23:39:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2655 transitions. [2020-10-26 23:39:37,672 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2655 transitions. Word has length 126 [2020-10-26 23:39:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:37,675 INFO L481 AbstractCegarLoop]: Abstraction has 1982 states and 2655 transitions. [2020-10-26 23:39:37,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:39:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2655 transitions. [2020-10-26 23:39:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 23:39:37,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:37,689 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, 1] [2020-10-26 23:39:37,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:39:37,690 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -205360748, now seen corresponding path program 1 times [2020-10-26 23:39:37,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:37,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554422392] [2020-10-26 23:39:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:38,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:38,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:38,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 23:39:38,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:39:38,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-26 23:39:38,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:39:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 23:39:38,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 23:39:38,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:38,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:38,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:38,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:38,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:38,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:39:38,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:38,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:38,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:38,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:38,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:38,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:38,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:39:38,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:38,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 23:39:38,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:39:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:39:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554422392] [2020-10-26 23:39:38,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:38,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:39:38,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766294125] [2020-10-26 23:39:38,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:39:38,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:38,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:39:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:39:38,939 INFO L87 Difference]: Start difference. First operand 1982 states and 2655 transitions. Second operand 5 states. [2020-10-26 23:39:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:46,530 INFO L93 Difference]: Finished difference Result 4922 states and 6890 transitions. [2020-10-26 23:39:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:39:46,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-26 23:39:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:46,557 INFO L225 Difference]: With dead ends: 4922 [2020-10-26 23:39:46,557 INFO L226 Difference]: Without dead ends: 2946 [2020-10-26 23:39:46,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:39:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2020-10-26 23:39:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2937. [2020-10-26 23:39:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2937 states. [2020-10-26 23:39:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 3794 transitions. [2020-10-26 23:39:46,660 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 3794 transitions. Word has length 147 [2020-10-26 23:39:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:46,661 INFO L481 AbstractCegarLoop]: Abstraction has 2937 states and 3794 transitions. [2020-10-26 23:39:46,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:39:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 3794 transitions. [2020-10-26 23:39:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 23:39:46,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:46,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:39:46,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:39:46,666 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:46,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1811212183, now seen corresponding path program 1 times [2020-10-26 23:39:46,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:46,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815579611] [2020-10-26 23:39:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:46,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:47,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:51,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:51,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 23:39:51,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:39:51,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 23:39:51,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:39:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:39:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-26 23:39:51,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:51,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:51,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:51,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:51,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:51,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:51,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:39:51,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:39:51,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:51,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:51,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:52,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:52,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:39:52,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:52,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 23:39:52,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:39:52,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:52,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:39:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:52,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:52,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:39:52,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:52,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-26 23:39:52,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:52,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:39:52,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 23:39:52,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815579611] [2020-10-26 23:39:52,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:52,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:39:52,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569588562] [2020-10-26 23:39:52,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:52,553 INFO L87 Difference]: Start difference. First operand 2937 states and 3794 transitions. Second operand 7 states. [2020-10-26 23:40:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:02,619 INFO L93 Difference]: Finished difference Result 8506 states and 11339 transitions. [2020-10-26 23:40:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:40:02,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-26 23:40:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:02,647 INFO L225 Difference]: With dead ends: 8506 [2020-10-26 23:40:02,647 INFO L226 Difference]: Without dead ends: 4605 [2020-10-26 23:40:02,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:40:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2020-10-26 23:40:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4526. [2020-10-26 23:40:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4526 states. [2020-10-26 23:40:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 5380 transitions. [2020-10-26 23:40:02,803 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 5380 transitions. Word has length 219 [2020-10-26 23:40:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:02,804 INFO L481 AbstractCegarLoop]: Abstraction has 4526 states and 5380 transitions. [2020-10-26 23:40:02,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 5380 transitions. [2020-10-26 23:40:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-26 23:40:02,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:02,809 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:02,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:40:02,810 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash -827791033, now seen corresponding path program 1 times [2020-10-26 23:40:02,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:02,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397614257] [2020-10-26 23:40:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:03,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:05,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:05,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-26 23:40:05,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:05,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2621 [2020-10-26 23:40:05,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 23:40:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 292 [2020-10-26 23:40:05,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:05,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:05,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:05,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:05,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:05,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:05,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:40:05,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:05,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:05,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:05,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:05,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:05,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:06,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:06,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:40:06,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-26 23:40:06,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:40:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-26 23:40:06,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:07,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397614257] [2020-10-26 23:40:07,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:07,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:07,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61151181] [2020-10-26 23:40:07,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:40:07,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:40:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:40:07,021 INFO L87 Difference]: Start difference. First operand 4526 states and 5380 transitions. Second operand 8 states. [2020-10-26 23:40:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:24,138 INFO L93 Difference]: Finished difference Result 11356 states and 13760 transitions. [2020-10-26 23:40:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:40:24,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 289 [2020-10-26 23:40:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:24,182 INFO L225 Difference]: With dead ends: 11356 [2020-10-26 23:40:24,182 INFO L226 Difference]: Without dead ends: 6527 [2020-10-26 23:40:24,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-26 23:40:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2020-10-26 23:40:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 6417. [2020-10-26 23:40:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6417 states. [2020-10-26 23:40:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 7490 transitions. [2020-10-26 23:40:24,511 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 7490 transitions. Word has length 289 [2020-10-26 23:40:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:24,512 INFO L481 AbstractCegarLoop]: Abstraction has 6417 states and 7490 transitions. [2020-10-26 23:40:24,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:40:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 7490 transitions. [2020-10-26 23:40:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-26 23:40:24,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:24,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:24,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:40:24,523 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash -113267975, now seen corresponding path program 1 times [2020-10-26 23:40:24,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:24,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786534623] [2020-10-26 23:40:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:24,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:26,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:29,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:29,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-26 23:40:29,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:40:29,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 23:40:29,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:40:29,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:29,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:29,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:29,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:29,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:29,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:40:29,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:29,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:29,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:29,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:29,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:29,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:30,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:30,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:30,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:40:30,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:30,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-26 23:40:30,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:40:30,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:30,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:40:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:30,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:30,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:30,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:40:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 23:40:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:40:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 88 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:40:31,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786534623] [2020-10-26 23:40:31,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:31,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:31,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438200441] [2020-10-26 23:40:31,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:31,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:31,199 INFO L87 Difference]: Start difference. First operand 6417 states and 7490 transitions. Second operand 7 states. [2020-10-26 23:40:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:39,463 INFO L93 Difference]: Finished difference Result 12573 states and 14751 transitions. [2020-10-26 23:40:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:40:39,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 337 [2020-10-26 23:40:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:39,494 INFO L225 Difference]: With dead ends: 12573 [2020-10-26 23:40:39,495 INFO L226 Difference]: Without dead ends: 6469 [2020-10-26 23:40:39,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:40:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2020-10-26 23:40:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6432. [2020-10-26 23:40:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6432 states. [2020-10-26 23:40:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 7507 transitions. [2020-10-26 23:40:39,720 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 7507 transitions. Word has length 337 [2020-10-26 23:40:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:39,721 INFO L481 AbstractCegarLoop]: Abstraction has 6432 states and 7507 transitions. [2020-10-26 23:40:39,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 7507 transitions. [2020-10-26 23:40:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-26 23:40:39,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:39,732 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:39,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:40:39,732 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:39,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1878082494, now seen corresponding path program 1 times [2020-10-26 23:40:39,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:39,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572790038] [2020-10-26 23:40:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:39,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:40,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:42,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:42,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-10-26 23:40:42,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:42,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2240 [2020-10-26 23:40:42,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:42,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:40:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 23:40:42,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:42,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:42,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:42,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:42,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:42,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:40:42,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:42,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:42,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:42,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:42,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:42,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:40:42,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:42,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-26 23:40:42,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:42,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:40:42,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:42,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:40:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:43,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:43,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:43,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:40:43,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:43,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 23:40:43,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:40:43,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:40:43,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572790038] [2020-10-26 23:40:43,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:43,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:43,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762045162] [2020-10-26 23:40:43,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:43,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:43,407 INFO L87 Difference]: Start difference. First operand 6432 states and 7507 transitions. Second operand 7 states. [2020-10-26 23:40:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:52,160 INFO L93 Difference]: Finished difference Result 14865 states and 17682 transitions. [2020-10-26 23:40:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:40:52,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 411 [2020-10-26 23:40:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:52,200 INFO L225 Difference]: With dead ends: 14865 [2020-10-26 23:40:52,200 INFO L226 Difference]: Without dead ends: 8746 [2020-10-26 23:40:52,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:40:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8746 states. [2020-10-26 23:40:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8746 to 8692. [2020-10-26 23:40:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8692 states. [2020-10-26 23:40:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8692 states to 8692 states and 10015 transitions. [2020-10-26 23:40:52,455 INFO L78 Accepts]: Start accepts. Automaton has 8692 states and 10015 transitions. Word has length 411 [2020-10-26 23:40:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:52,456 INFO L481 AbstractCegarLoop]: Abstraction has 8692 states and 10015 transitions. [2020-10-26 23:40:52,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8692 states and 10015 transitions. [2020-10-26 23:40:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-10-26 23:40:52,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:52,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:52,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:40:52,466 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1392353088, now seen corresponding path program 1 times [2020-10-26 23:40:52,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:52,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422115798] [2020-10-26 23:40:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:52,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:55,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:55,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 451 [2020-10-26 23:40:55,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:55,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-10-26 23:40:55,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:40:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:40:55,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:55,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:55,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:55,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:55,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:55,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:55,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:40:55,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:55,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:55,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:55,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:55,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:40:55,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:55,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-26 23:40:55,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:40:55,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:55,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:40:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:55,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:56,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:56,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:40:56,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:56,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-26 23:40:56,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:56,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:56,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:40:56,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:40:56,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422115798] [2020-10-26 23:40:56,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:56,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:56,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324993541] [2020-10-26 23:40:56,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:56,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:56,563 INFO L87 Difference]: Start difference. First operand 8692 states and 10015 transitions. Second operand 7 states. [2020-10-26 23:41:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:06,127 INFO L93 Difference]: Finished difference Result 19628 states and 22611 transitions. [2020-10-26 23:41:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:41:06,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 437 [2020-10-26 23:41:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:06,178 INFO L225 Difference]: With dead ends: 19628 [2020-10-26 23:41:06,178 INFO L226 Difference]: Without dead ends: 11249 [2020-10-26 23:41:06,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11249 states. [2020-10-26 23:41:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11249 to 11194. [2020-10-26 23:41:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11194 states. [2020-10-26 23:41:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11194 states to 11194 states and 12671 transitions. [2020-10-26 23:41:06,519 INFO L78 Accepts]: Start accepts. Automaton has 11194 states and 12671 transitions. Word has length 437 [2020-10-26 23:41:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:06,521 INFO L481 AbstractCegarLoop]: Abstraction has 11194 states and 12671 transitions. [2020-10-26 23:41:06,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:41:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 11194 states and 12671 transitions. [2020-10-26 23:41:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-10-26 23:41:06,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:06,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:06,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:41:06,533 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1794523704, now seen corresponding path program 1 times [2020-10-26 23:41:06,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:06,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037309543] [2020-10-26 23:41:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:06,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:07,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:07,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-10-26 23:41:07,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:07,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-26 23:41:07,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:07,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:41:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 23:41:07,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:07,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:08,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:08,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:08,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:08,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:08,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:41:08,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:08,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:08,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:08,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:08,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:08,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 23:41:08,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:08,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:08,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:08,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:08,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:08,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:41:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:08,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:08,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:41:08,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:08,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 23:41:08,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:08,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:08,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:41:08,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 23:41:08,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037309543] [2020-10-26 23:41:08,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:08,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:41:08,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282562727] [2020-10-26 23:41:08,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:41:08,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:41:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:41:08,982 INFO L87 Difference]: Start difference. First operand 11194 states and 12671 transitions. Second operand 5 states. [2020-10-26 23:41:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:17,934 INFO L93 Difference]: Finished difference Result 22182 states and 25721 transitions. [2020-10-26 23:41:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:41:17,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-10-26 23:41:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:18,007 INFO L225 Difference]: With dead ends: 22182 [2020-10-26 23:41:18,008 INFO L226 Difference]: Without dead ends: 13813 [2020-10-26 23:41:18,033 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 [2020-10-26 23:41:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13813 states. [2020-10-26 23:41:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13813 to 13780. [2020-10-26 23:41:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13780 states. [2020-10-26 23:41:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13780 states to 13780 states and 15889 transitions. [2020-10-26 23:41:18,414 INFO L78 Accepts]: Start accepts. Automaton has 13780 states and 15889 transitions. Word has length 449 [2020-10-26 23:41:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:18,415 INFO L481 AbstractCegarLoop]: Abstraction has 13780 states and 15889 transitions. [2020-10-26 23:41:18,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:41:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 13780 states and 15889 transitions. [2020-10-26 23:41:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-26 23:41:18,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:18,427 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:18,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:41:18,427 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash 234454050, now seen corresponding path program 1 times [2020-10-26 23:41:18,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:18,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409808481] [2020-10-26 23:41:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:20,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:22,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:22,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 499 [2020-10-26 23:41:22,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3783 [2020-10-26 23:41:22,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 23:41:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 480 [2020-10-26 23:41:22,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:22,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:22,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:22,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:22,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:22,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 23:41:22,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:22,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:22,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:23,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:23,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:23,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:23,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-26 23:41:23,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:23,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-26 23:41:23,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:23,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:41:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:23,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:23,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 23:41:23,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:23,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-26 23:41:23,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:23,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:41:23,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 23:41:23,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 204 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:41:23,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409808481] [2020-10-26 23:41:23,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:23,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:41:23,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628789665] [2020-10-26 23:41:23,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 23:41:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:23,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 23:41:23,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 23:41:23,895 INFO L87 Difference]: Start difference. First operand 13780 states and 15889 transitions. Second operand 9 states. [2020-10-26 23:41:26,708 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-26 23:41:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:38,959 INFO L93 Difference]: Finished difference Result 28615 states and 34540 transitions. [2020-10-26 23:41:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:41:38,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 485 [2020-10-26 23:41:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:39,027 INFO L225 Difference]: With dead ends: 28615 [2020-10-26 23:41:39,027 INFO L226 Difference]: Without dead ends: 17386 [2020-10-26 23:41:39,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:41:39,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17386 states. [2020-10-26 23:41:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17386 to 16949. [2020-10-26 23:41:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16949 states. [2020-10-26 23:41:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16949 states to 16949 states and 19833 transitions. [2020-10-26 23:41:39,512 INFO L78 Accepts]: Start accepts. Automaton has 16949 states and 19833 transitions. Word has length 485 [2020-10-26 23:41:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:39,513 INFO L481 AbstractCegarLoop]: Abstraction has 16949 states and 19833 transitions. [2020-10-26 23:41:39,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 23:41:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 16949 states and 19833 transitions. [2020-10-26 23:41:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-10-26 23:41:39,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:39,523 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:39,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:41:39,523 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1066329357, now seen corresponding path program 1 times [2020-10-26 23:41:39,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:39,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532307032] [2020-10-26 23:41:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:39,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:40,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:41,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:42,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:43,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 537 [2020-10-26 23:41:43,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:41:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3496 [2020-10-26 23:41:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:41:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:41:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:41:43,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:43,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:43,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:43,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:43,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:43,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:41:43,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:43,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:43,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:43,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:43,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:43,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:43,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:43,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:43,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 23:41:43,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:43,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:43,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:43,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:41:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:43,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:43,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:41:43,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:43,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 23:41:43,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:41:43,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:43,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:41:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:43,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:44,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:44,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:44,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:41:44,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:44,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 23:41:44,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:41:44,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 228 proven. 45 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-26 23:41:44,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532307032] [2020-10-26 23:41:44,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:44,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:41:44,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695512406] [2020-10-26 23:41:44,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:41:44,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:41:44,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:41:44,356 INFO L87 Difference]: Start difference. First operand 16949 states and 19833 transitions. Second operand 6 states. [2020-10-26 23:41:46,441 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:41:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:54,544 INFO L93 Difference]: Finished difference Result 33948 states and 39823 transitions. [2020-10-26 23:41:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:41:54,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 521 [2020-10-26 23:41:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:54,596 INFO L225 Difference]: With dead ends: 33948 [2020-10-26 23:41:54,596 INFO L226 Difference]: Without dead ends: 17312 [2020-10-26 23:41:54,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:41:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17312 states. [2020-10-26 23:41:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17312 to 17246. [2020-10-26 23:41:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17246 states. [2020-10-26 23:41:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17246 states to 17246 states and 19232 transitions. [2020-10-26 23:41:54,966 INFO L78 Accepts]: Start accepts. Automaton has 17246 states and 19232 transitions. Word has length 521 [2020-10-26 23:41:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:54,967 INFO L481 AbstractCegarLoop]: Abstraction has 17246 states and 19232 transitions. [2020-10-26 23:41:54,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:41:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 17246 states and 19232 transitions. [2020-10-26 23:41:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2020-10-26 23:41:54,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:54,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:54,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:41:54,975 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:54,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1136777174, now seen corresponding path program 1 times [2020-10-26 23:41:54,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:54,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200113393] [2020-10-26 23:41:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:55,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:56,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:58,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:58,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 566 [2020-10-26 23:41:58,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:41:58,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3785 [2020-10-26 23:41:58,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:41:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 23:41:58,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:59,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:59,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:59,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:59,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:59,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:59,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:41:59,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:59,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:59,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:59,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:59,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:59,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:59,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:41:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:59,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:59,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:59,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:41:59,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:59,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 23:41:59,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:59,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:59,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:59,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:41:59,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:59,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:41:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:59,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:59,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 23:41:59,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 23:41:59,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:59,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 23:41:59,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:42:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 333 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:42:00,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200113393] [2020-10-26 23:42:00,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:00,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:00,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129607312] [2020-10-26 23:42:00,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:00,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:00,006 INFO L87 Difference]: Start difference. First operand 17246 states and 19232 transitions. Second operand 7 states. [2020-10-26 23:42:02,418 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:42:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:15,369 INFO L93 Difference]: Finished difference Result 34588 states and 39340 transitions. [2020-10-26 23:42:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:42:15,373 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 550 [2020-10-26 23:42:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:15,445 INFO L225 Difference]: With dead ends: 34588 [2020-10-26 23:42:15,445 INFO L226 Difference]: Without dead ends: 19529 [2020-10-26 23:42:15,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:42:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19529 states. [2020-10-26 23:42:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19529 to 18849. [2020-10-26 23:42:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18849 states. [2020-10-26 23:42:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 21087 transitions. [2020-10-26 23:42:15,962 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 21087 transitions. Word has length 550 [2020-10-26 23:42:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:15,963 INFO L481 AbstractCegarLoop]: Abstraction has 18849 states and 21087 transitions. [2020-10-26 23:42:15,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:42:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 21087 transitions. [2020-10-26 23:42:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2020-10-26 23:42:15,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:15,973 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:42:15,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 23:42:15,973 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:15,974 INFO L82 PathProgramCache]: Analyzing trace with hash -917977894, now seen corresponding path program 1 times [2020-10-26 23:42:15,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:15,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283670928] [2020-10-26 23:42:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:16,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:18,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:19,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 593 [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3506 [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-26 23:42:19,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:19,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:19,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:19,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:19,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:19,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:42:19,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:19,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:19,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:19,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:19,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:42:19,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:19,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 23:42:19,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:19,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:20,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:42:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:20,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:20,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:20,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:42:20,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:20,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 23:42:20,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:42:20,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:20,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:42:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:20,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:20,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 23:42:20,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:20,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 23:42:20,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:42:20,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 370 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:42:20,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283670928] [2020-10-26 23:42:20,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:20,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:20,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102467732] [2020-10-26 23:42:20,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:20,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:20,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:20,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:20,829 INFO L87 Difference]: Start difference. First operand 18849 states and 21087 transitions. Second operand 7 states. [2020-10-26 23:42:24,417 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 65