/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:41:55,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:41:55,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:41:55,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:41:55,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:41:55,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:41:55,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:41:55,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:41:55,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:41:55,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:41:55,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:41:55,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:41:55,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:41:55,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:41:55,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:41:55,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:41:55,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:41:55,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:41:55,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:41:55,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:41:55,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:41:55,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:41:55,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:41:55,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:41:55,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:41:55,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:41:55,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:41:55,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:41:55,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:41:55,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:41:55,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:41:55,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:41:55,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:41:55,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:41:55,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:41:55,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:41:55,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:41:55,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:41:55,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:41:55,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:41:55,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:41:55,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:41:55,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:41:55,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:41:55,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:41:55,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:41:55,339 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:41:55,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:41:55,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:41:55,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:41:55,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:41:55,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:41:55,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:41:55,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:41:55,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:41:55,342 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:41:55,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:41:55,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:41:55,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:41:55,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:41:55,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:41:55,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:41:55,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:41:55,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:55,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:41:55,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:41:55,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:41:55,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:41:55,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:41:55,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:41:55,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:41:55,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:41:55,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:41:55,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:41:55,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:41:55,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:41:55,837 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:41:55,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12.c [2020-10-26 20:41:55,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d6f4099/746b0b330010482084d3b052f335916e/FLAGa95893cf4 [2020-10-26 20:41:56,698 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:41:56,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label12.c [2020-10-26 20:41:56,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d6f4099/746b0b330010482084d3b052f335916e/FLAGa95893cf4 [2020-10-26 20:41:56,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d6f4099/746b0b330010482084d3b052f335916e [2020-10-26 20:41:56,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:41:56,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:41:56,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:56,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:41:56,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:41:56,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:56" (1/1) ... [2020-10-26 20:41:56,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96fca4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:56, skipping insertion in model container [2020-10-26 20:41:56,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:56" (1/1) ... [2020-10-26 20:41:56,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:41:56,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:41:57,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:57,682 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:41:58,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:58,135 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:41:58,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58 WrapperNode [2020-10-26 20:41:58,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:58,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:41:58,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:41:58,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:41:58,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... [2020-10-26 20:41:58,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... [2020-10-26 20:41:58,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... [2020-10-26 20:41:58,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... [2020-10-26 20:41:58,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... [2020-10-26 20:41:58,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... [2020-10-26 20:41:58,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... [2020-10-26 20:41:58,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:41:58,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:41:58,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:41:58,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:41:58,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:58,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:41:58,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:41:58,453 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:41:58,454 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:41:58,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:41:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:41:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:41:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:41:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:41:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:41:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:41:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:41:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:41:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:41:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:41:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:41:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:41:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:41:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:42:00,658 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:42:00,659 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:42:00,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:42:00 BoogieIcfgContainer [2020-10-26 20:42:00,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:42:00,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:42:00,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:42:00,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:42:00,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:41:56" (1/3) ... [2020-10-26 20:42:00,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36edebda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:42:00, skipping insertion in model container [2020-10-26 20:42:00,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:58" (2/3) ... [2020-10-26 20:42:00,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36edebda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:42:00, skipping insertion in model container [2020-10-26 20:42:00,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:42:00" (3/3) ... [2020-10-26 20:42:00,676 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2020-10-26 20:42:00,690 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:42:00,697 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:42:00,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:42:00,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:42:00,764 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:42:00,764 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:42:00,764 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:42:00,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:42:00,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:42:00,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:42:00,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:42:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:42:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 20:42:00,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:00,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:00,831 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1754186376, now seen corresponding path program 1 times [2020-10-26 20:42:00,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:00,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119042973] [2020-10-26 20:42:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:01,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:02,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:06,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:06,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-26 20:42:06,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:06,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 20:42:06,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:42:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:42:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:42:08,040 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:08,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:08,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:08,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:08,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:08,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:08,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:42:08,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:08,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:08,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:42:08,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119042973] [2020-10-26 20:42:08,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:42:08,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:42:08,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241175739] [2020-10-26 20:42:08,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:42:08,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:42:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:42:08,692 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:42:09,259 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 20:42:10,341 WARN L193 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 20:42:11,398 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 20:42:12,497 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 20:42:14,374 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 227 DAG size of output: 203 [2020-10-26 20:42:16,402 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 227 DAG size of output: 202 [2020-10-26 20:42:18,680 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 230 DAG size of output: 201 [2020-10-26 20:42:22,791 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 231 DAG size of output: 200 [2020-10-26 20:42:24,216 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 233 DAG size of output: 198 [2020-10-26 20:42:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:27,284 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:42:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:42:27,287 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 170 [2020-10-26 20:42:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:27,313 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:42:27,313 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:42:27,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:42:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:42:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:42:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:42:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:42:27,436 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 170 [2020-10-26 20:42:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:27,440 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:42:27,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:42:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:42:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 20:42:27,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:27,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:27,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:42:27,460 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:27,461 INFO L82 PathProgramCache]: Analyzing trace with hash 133162021, now seen corresponding path program 1 times [2020-10-26 20:42:27,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:27,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765941273] [2020-10-26 20:42:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:27,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:27,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:32,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-26 20:42:32,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:32,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 20:42:32,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:32,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:32,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:32,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-26 20:42:32,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:33,136 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:33,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:33,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:33,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:33,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:33,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:33,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:42:33,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:33,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:33,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:33,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:33,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:33,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:42:33,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:33,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:33,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:33,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:33,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:42:33,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765941273] [2020-10-26 20:42:33,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:33,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:33,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510006714] [2020-10-26 20:42:33,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:42:33,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:33,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:42:33,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:33,456 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:42:33,747 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:36,879 INFO L93 Difference]: Finished difference Result 849 states and 1316 transitions. [2020-10-26 20:42:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:42:36,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2020-10-26 20:42:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:36,894 INFO L225 Difference]: With dead ends: 849 [2020-10-26 20:42:36,894 INFO L226 Difference]: Without dead ends: 605 [2020-10-26 20:42:36,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-26 20:42:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 599. [2020-10-26 20:42:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-10-26 20:42:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 860 transitions. [2020-10-26 20:42:36,965 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 860 transitions. Word has length 181 [2020-10-26 20:42:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:36,967 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 860 transitions. [2020-10-26 20:42:36,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:42:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 860 transitions. [2020-10-26 20:42:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-26 20:42:36,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:36,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-26 20:42:36,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:42:36,975 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:36,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:36,976 INFO L82 PathProgramCache]: Analyzing trace with hash -116314532, now seen corresponding path program 1 times [2020-10-26 20:42:36,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:36,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52084607] [2020-10-26 20:42:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:37,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:41,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:41,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-26 20:42:41,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:41,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4844 [2020-10-26 20:42:41,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:42:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:42,171 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:42,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:42,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:42,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:42,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:42:42,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:42,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:42,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:42,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:42,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:42,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 20:42:42,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:42,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:42:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:42,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:42:42,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:42,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:42:42,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:42,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:42:42,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:42,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52084607] [2020-10-26 20:42:42,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:42,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:42,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97840245] [2020-10-26 20:42:42,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:42,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:42,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:42,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:42,635 INFO L87 Difference]: Start difference. First operand 599 states and 860 transitions. Second operand 8 states. [2020-10-26 20:42:42,900 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:47,114 INFO L93 Difference]: Finished difference Result 1587 states and 2382 transitions. [2020-10-26 20:42:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:42:47,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 190 [2020-10-26 20:42:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:47,124 INFO L225 Difference]: With dead ends: 1587 [2020-10-26 20:42:47,124 INFO L226 Difference]: Without dead ends: 1109 [2020-10-26 20:42:47,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:42:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-10-26 20:42:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1084. [2020-10-26 20:42:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2020-10-26 20:42:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1596 transitions. [2020-10-26 20:42:47,179 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1596 transitions. Word has length 190 [2020-10-26 20:42:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:47,179 INFO L481 AbstractCegarLoop]: Abstraction has 1084 states and 1596 transitions. [2020-10-26 20:42:47,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1596 transitions. [2020-10-26 20:42:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-26 20:42:47,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:47,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:47,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:42:47,184 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1159449809, now seen corresponding path program 1 times [2020-10-26 20:42:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:47,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716508051] [2020-10-26 20:42:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:47,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:48,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:48,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 20:42:48,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:48,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-26 20:42:48,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:48,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:48,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:42:48,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-26 20:42:48,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:48,396 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:48,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:48,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:48,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:48,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:42:48,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:48,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 20:42:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:48,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:48,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:48,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:48,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:42:48,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:48,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:48,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:48,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:42:48,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716508051] [2020-10-26 20:42:48,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:48,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:48,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875206536] [2020-10-26 20:42:48,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:42:48,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:42:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:42:48,684 INFO L87 Difference]: Start difference. First operand 1084 states and 1596 transitions. Second operand 5 states. [2020-10-26 20:42:49,138 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:52,406 INFO L93 Difference]: Finished difference Result 2949 states and 4512 transitions. [2020-10-26 20:42:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:42:52,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-10-26 20:42:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:52,423 INFO L225 Difference]: With dead ends: 2949 [2020-10-26 20:42:52,424 INFO L226 Difference]: Without dead ends: 1986 [2020-10-26 20:42:52,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2020-10-26 20:42:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1948. [2020-10-26 20:42:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1948 states. [2020-10-26 20:42:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2880 transitions. [2020-10-26 20:42:52,500 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2880 transitions. Word has length 191 [2020-10-26 20:42:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:52,501 INFO L481 AbstractCegarLoop]: Abstraction has 1948 states and 2880 transitions. [2020-10-26 20:42:52,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:42:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2880 transitions. [2020-10-26 20:42:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-26 20:42:52,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:52,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:52,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:42:52,509 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1844729972, now seen corresponding path program 1 times [2020-10-26 20:42:52,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:52,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999117642] [2020-10-26 20:42:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:52,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:54,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:54,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:54,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 20:42:54,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:54,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2220 [2020-10-26 20:42:54,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:54,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:54,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:42:54,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:42:54,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:55,068 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:55,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:55,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:55,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:55,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:55,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:55,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:42:55,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:55,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:55,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:55,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:55,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:55,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:55,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:42:55,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:55,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:55,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:55,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:55,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:42:55,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:55,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:55,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:55,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:42:55,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:42:55,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:42:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:42:55,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999117642] [2020-10-26 20:42:55,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:55,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:55,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487575726] [2020-10-26 20:42:55,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:42:55,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:42:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:55,470 INFO L87 Difference]: Start difference. First operand 1948 states and 2880 transitions. Second operand 7 states. [2020-10-26 20:42:55,989 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:56,246 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:02,149 INFO L93 Difference]: Finished difference Result 6576 states and 10763 transitions. [2020-10-26 20:43:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:43:02,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-10-26 20:43:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:02,191 INFO L225 Difference]: With dead ends: 6576 [2020-10-26 20:43:02,191 INFO L226 Difference]: Without dead ends: 4749 [2020-10-26 20:43:02,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2020-10-26 20:43:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 4609. [2020-10-26 20:43:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4609 states. [2020-10-26 20:43:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 6473 transitions. [2020-10-26 20:43:02,430 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 6473 transitions. Word has length 201 [2020-10-26 20:43:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:02,431 INFO L481 AbstractCegarLoop]: Abstraction has 4609 states and 6473 transitions. [2020-10-26 20:43:02,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 6473 transitions. [2020-10-26 20:43:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 20:43:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:02,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:02,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:43:02,449 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash -783427808, now seen corresponding path program 1 times [2020-10-26 20:43:02,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:02,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137665192] [2020-10-26 20:43:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:02,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:03,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:06,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:06,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-26 20:43:06,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:06,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4132 [2020-10-26 20:43:06,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:06,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:06,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:06,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:43:06,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:06,911 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:06,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:06,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:06,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:06,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:06,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:43:06,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:06,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:06,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:06,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:07,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:07,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:07,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:07,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:07,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:07,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 20:43:07,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:07,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:07,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:07,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:07,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:07,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:07,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:07,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:07,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:43:07,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:07,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:43:07,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:07,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:07,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:07,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:43:07,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:43:07,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137665192] [2020-10-26 20:43:07,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:07,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:07,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437080168] [2020-10-26 20:43:07,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:07,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:07,324 INFO L87 Difference]: Start difference. First operand 4609 states and 6473 transitions. Second operand 8 states. [2020-10-26 20:43:07,584 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:09,803 INFO L93 Difference]: Finished difference Result 9035 states and 12828 transitions. [2020-10-26 20:43:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:43:09,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 208 [2020-10-26 20:43:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:09,831 INFO L225 Difference]: With dead ends: 9035 [2020-10-26 20:43:09,831 INFO L226 Difference]: Without dead ends: 4547 [2020-10-26 20:43:09,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:43:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2020-10-26 20:43:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4545. [2020-10-26 20:43:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4545 states. [2020-10-26 20:43:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 6179 transitions. [2020-10-26 20:43:10,017 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 6179 transitions. Word has length 208 [2020-10-26 20:43:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:10,018 INFO L481 AbstractCegarLoop]: Abstraction has 4545 states and 6179 transitions. [2020-10-26 20:43:10,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 6179 transitions. [2020-10-26 20:43:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 20:43:10,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:10,036 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:10,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:43:10,036 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1467694352, now seen corresponding path program 1 times [2020-10-26 20:43:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:10,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036181466] [2020-10-26 20:43:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:10,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:10,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:10,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:14,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 20:43:15,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,384 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:15,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:15,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:15,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:15,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:43:15,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:15,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:15,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:15,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,584 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:43:15,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:15,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:15,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:15,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 20:43:15,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:43:15,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:43:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 20:43:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:15,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:43:15,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:15,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:43:15,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:15,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:15,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:43:15,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:15,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:43:15,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036181466] [2020-10-26 20:43:15,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:15,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:15,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706799713] [2020-10-26 20:43:15,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:15,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:15,818 INFO L87 Difference]: Start difference. First operand 4545 states and 6179 transitions. Second operand 7 states. [2020-10-26 20:43:16,068 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:17,431 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:19,745 INFO L93 Difference]: Finished difference Result 9866 states and 13779 transitions. [2020-10-26 20:43:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:43:19,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 227 [2020-10-26 20:43:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:19,775 INFO L225 Difference]: With dead ends: 9866 [2020-10-26 20:43:19,775 INFO L226 Difference]: Without dead ends: 5458 [2020-10-26 20:43:19,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2020-10-26 20:43:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5396. [2020-10-26 20:43:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5396 states. [2020-10-26 20:43:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5396 states to 5396 states and 6843 transitions. [2020-10-26 20:43:19,955 INFO L78 Accepts]: Start accepts. Automaton has 5396 states and 6843 transitions. Word has length 227 [2020-10-26 20:43:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:19,955 INFO L481 AbstractCegarLoop]: Abstraction has 5396 states and 6843 transitions. [2020-10-26 20:43:19,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5396 states and 6843 transitions. [2020-10-26 20:43:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 20:43:19,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:19,970 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:19,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:43:19,970 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1202173867, now seen corresponding path program 1 times [2020-10-26 20:43:19,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:19,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941770100] [2020-10-26 20:43:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:22,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:22,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 20:43:22,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:22,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1991 [2020-10-26 20:43:22,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:43:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 20:43:22,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:22,331 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:22,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:22,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:22,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:22,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:22,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:22,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:22,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:22,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:43:22,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:43:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:22,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:22,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:22,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:43:22,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:22,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 20:43:22,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:22,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:22,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:22,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:43:22,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:43:22,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941770100] [2020-10-26 20:43:22,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:22,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:22,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936896246] [2020-10-26 20:43:22,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:22,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:22,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:22,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:22,857 INFO L87 Difference]: Start difference. First operand 5396 states and 6843 transitions. Second operand 7 states. [2020-10-26 20:43:23,341 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:25,524 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:43:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:27,718 INFO L93 Difference]: Finished difference Result 16159 states and 22958 transitions. [2020-10-26 20:43:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:27,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 229 [2020-10-26 20:43:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:27,803 INFO L225 Difference]: With dead ends: 16159 [2020-10-26 20:43:27,803 INFO L226 Difference]: Without dead ends: 10884 [2020-10-26 20:43:27,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:43:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10884 states. [2020-10-26 20:43:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10884 to 10578. [2020-10-26 20:43:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10578 states. [2020-10-26 20:43:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10578 states to 10578 states and 13473 transitions. [2020-10-26 20:43:28,209 INFO L78 Accepts]: Start accepts. Automaton has 10578 states and 13473 transitions. Word has length 229 [2020-10-26 20:43:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:28,209 INFO L481 AbstractCegarLoop]: Abstraction has 10578 states and 13473 transitions. [2020-10-26 20:43:28,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10578 states and 13473 transitions. [2020-10-26 20:43:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-26 20:43:28,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:28,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:28,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:43:28,235 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash -207333114, now seen corresponding path program 1 times [2020-10-26 20:43:28,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:28,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374232745] [2020-10-26 20:43:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:28,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:28,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:30,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:30,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 20:43:30,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:30,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2592 [2020-10-26 20:43:30,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:43:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-26 20:43:30,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:31,366 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:31,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:31,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:31,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:31,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:31,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:31,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:43:31,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:31,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:31,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:31,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:31,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:31,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:31,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:43:31,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:31,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 20:43:31,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:43:31,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:31,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:43:31,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:43:32,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374232745] [2020-10-26 20:43:32,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:32,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:32,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108232681] [2020-10-26 20:43:32,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:43:32,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:43:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:43:32,192 INFO L87 Difference]: Start difference. First operand 10578 states and 13473 transitions. Second operand 9 states. [2020-10-26 20:43:32,518 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:43:33,003 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:34,483 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:39,491 INFO L93 Difference]: Finished difference Result 39853 states and 54405 transitions. [2020-10-26 20:43:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:43:39,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 249 [2020-10-26 20:43:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:39,637 INFO L225 Difference]: With dead ends: 39853 [2020-10-26 20:43:39,637 INFO L226 Difference]: Without dead ends: 29396 [2020-10-26 20:43:39,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:43:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29396 states. [2020-10-26 20:43:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29396 to 29090. [2020-10-26 20:43:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29090 states. [2020-10-26 20:43:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29090 states to 29090 states and 37805 transitions. [2020-10-26 20:43:40,832 INFO L78 Accepts]: Start accepts. Automaton has 29090 states and 37805 transitions. Word has length 249 [2020-10-26 20:43:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:40,833 INFO L481 AbstractCegarLoop]: Abstraction has 29090 states and 37805 transitions. [2020-10-26 20:43:40,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:43:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29090 states and 37805 transitions. [2020-10-26 20:43:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-26 20:43:40,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:40,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:43:40,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:43:40,897 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1960168360, now seen corresponding path program 1 times [2020-10-26 20:43:40,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:40,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440049015] [2020-10-26 20:43:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:43,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:46,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:46,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-26 20:43:46,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:43:46,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 20:43:46,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:46,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:46,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 20:43:46,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:46,423 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:46,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:46,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:46,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:46,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:46,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:43:46,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:46,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:46,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:46,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:46,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:46,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:43:46,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:46,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:46,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:46,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:46,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:43:46,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-26 20:43:46,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:43:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:46,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 20:43:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:46,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:47,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:43:47,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440049015] [2020-10-26 20:43:47,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:47,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:47,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938988540] [2020-10-26 20:43:47,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:47,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:47,139 INFO L87 Difference]: Start difference. First operand 29090 states and 37805 transitions. Second operand 7 states. [2020-10-26 20:43:47,389 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:43:50,698 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:50,877 INFO L93 Difference]: Finished difference Result 65531 states and 86103 transitions. [2020-10-26 20:43:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:50,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 298 [2020-10-26 20:43:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:51,027 INFO L225 Difference]: With dead ends: 65531 [2020-10-26 20:43:51,027 INFO L226 Difference]: Without dead ends: 36562 [2020-10-26 20:43:51,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36562 states. [2020-10-26 20:43:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36562 to 36457. [2020-10-26 20:43:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36457 states. [2020-10-26 20:43:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36457 states to 36457 states and 47916 transitions. [2020-10-26 20:43:52,482 INFO L78 Accepts]: Start accepts. Automaton has 36457 states and 47916 transitions. Word has length 298 [2020-10-26 20:43:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:52,483 INFO L481 AbstractCegarLoop]: Abstraction has 36457 states and 47916 transitions. [2020-10-26 20:43:52,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 36457 states and 47916 transitions. [2020-10-26 20:43:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-26 20:43:52,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:52,571 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:43:52,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:43:52,572 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash -150962633, now seen corresponding path program 1 times [2020-10-26 20:43:52,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:52,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433362537] [2020-10-26 20:43:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:52,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:52,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:54,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:57,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:57,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-26 20:43:57,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:57,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:43:57,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 20:43:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:57,972 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:57,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:58,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:43:58,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:58,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:58,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 20:43:58,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 20:43:58,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 20:43:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:58,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 130 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:43:59,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433362537] [2020-10-26 20:43:59,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:59,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:59,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732806366] [2020-10-26 20:43:59,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:59,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:59,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:59,037 INFO L87 Difference]: Start difference. First operand 36457 states and 47916 transitions. Second operand 8 states. [2020-10-26 20:43:59,305 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:00,804 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:44:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:03,414 INFO L93 Difference]: Finished difference Result 95820 states and 127661 transitions. [2020-10-26 20:44:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:44:03,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 306 [2020-10-26 20:44:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:03,836 INFO L225 Difference]: With dead ends: 95820 [2020-10-26 20:44:03,836 INFO L226 Difference]: Without dead ends: 59484 [2020-10-26 20:44:03,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59484 states. [2020-10-26 20:44:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59484 to 59375. [2020-10-26 20:44:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59375 states. [2020-10-26 20:44:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59375 states to 59375 states and 77086 transitions. [2020-10-26 20:44:05,820 INFO L78 Accepts]: Start accepts. Automaton has 59375 states and 77086 transitions. Word has length 306 [2020-10-26 20:44:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:05,821 INFO L481 AbstractCegarLoop]: Abstraction has 59375 states and 77086 transitions. [2020-10-26 20:44:05,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 59375 states and 77086 transitions. [2020-10-26 20:44:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-26 20:44:05,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:05,890 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:05,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:44:05,891 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2098435305, now seen corresponding path program 1 times [2020-10-26 20:44:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:05,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959728386] [2020-10-26 20:44:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:09,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 20:44:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,313 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:11,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:11,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:11,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:44:11,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:11,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:44:11,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:11,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-26 20:44:11,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:11,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:11,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:44:11,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:44:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:44:11,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:11,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:44:11,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:44:11,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:44:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:44:11,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:11,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:44:11,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:44:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:11,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 142 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:44:12,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959728386] [2020-10-26 20:44:12,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:12,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:44:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179419223] [2020-10-26 20:44:12,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:12,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:12,173 INFO L87 Difference]: Start difference. First operand 59375 states and 77086 transitions. Second operand 8 states. [2020-10-26 20:44:12,430 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:44:13,864 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:44:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:16,473 INFO L93 Difference]: Finished difference Result 129609 states and 170154 transitions. [2020-10-26 20:44:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:44:16,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 318 [2020-10-26 20:44:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:16,716 INFO L225 Difference]: With dead ends: 129609 [2020-10-26 20:44:16,716 INFO L226 Difference]: Without dead ends: 70355 [2020-10-26 20:44:16,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70355 states. [2020-10-26 20:44:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70355 to 70115. [2020-10-26 20:44:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70115 states. [2020-10-26 20:44:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70115 states to 70115 states and 89677 transitions. [2020-10-26 20:44:18,835 INFO L78 Accepts]: Start accepts. Automaton has 70115 states and 89677 transitions. Word has length 318 [2020-10-26 20:44:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:18,836 INFO L481 AbstractCegarLoop]: Abstraction has 70115 states and 89677 transitions. [2020-10-26 20:44:18,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 70115 states and 89677 transitions. [2020-10-26 20:44:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-26 20:44:19,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:19,165 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:19,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:44:19,165 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1950682251, now seen corresponding path program 1 times [2020-10-26 20:44:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:19,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563485644] [2020-10-26 20:44:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:19,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:19,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:44:24,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:24,568 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:24,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:24,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:24,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:24,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:24,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:24,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:44:24,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:24,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:24,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:24,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:24,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:24,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:24,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:24,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:24,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:24,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:44:24,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:24,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:24,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:24,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:44:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:24,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:24,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:24,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:24,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:44:24,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 20:44:24,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:24,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:44:24,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:25,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:44:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:25,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:25,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:25,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:44:25,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:25,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 20:44:25,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 20:44:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:25,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:25,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-26 20:44:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:25,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:25,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:44:25,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:44:25,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:44:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:25,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 153 proven. 68 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-26 20:44:25,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563485644] [2020-10-26 20:44:25,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:25,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:44:25,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978586216] [2020-10-26 20:44:25,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:25,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:25,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:25,329 INFO L87 Difference]: Start difference. First operand 70115 states and 89677 transitions. Second operand 8 states. [2020-10-26 20:44:25,613 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:44:27,104 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:44:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:29,879 INFO L93 Difference]: Finished difference Result 163103 states and 209325 transitions. [2020-10-26 20:44:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:44:29,879 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 328 [2020-10-26 20:44:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:30,232 INFO L225 Difference]: With dead ends: 163103 [2020-10-26 20:44:30,232 INFO L226 Difference]: Without dead ends: 93109 [2020-10-26 20:44:30,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:44:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93109 states. [2020-10-26 20:44:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93109 to 92613. [2020-10-26 20:44:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92613 states. [2020-10-26 20:44:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92613 states to 92613 states and 117531 transitions. [2020-10-26 20:44:33,167 INFO L78 Accepts]: Start accepts. Automaton has 92613 states and 117531 transitions. Word has length 328 [2020-10-26 20:44:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:33,167 INFO L481 AbstractCegarLoop]: Abstraction has 92613 states and 117531 transitions. [2020-10-26 20:44:33,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 92613 states and 117531 transitions. [2020-10-26 20:44:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-26 20:44:33,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:33,231 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:33,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:44:33,232 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1764666602, now seen corresponding path program 1 times [2020-10-26 20:44:33,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:33,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320738069] [2020-10-26 20:44:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:33,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:33,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:34,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:34,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:37,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:38,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:38,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-26 20:44:38,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:44:38,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 20:44:38,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:38,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:38,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:38,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 20:44:38,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:38,850 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:38,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:38,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:38,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:38,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:38,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:38,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:44:38,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:38,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:38,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:38,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:38,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:38,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:38,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:38,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:44:39,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:44:39,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:39,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:39,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:44:39,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:39,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-26 20:44:39,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:44:39,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:39,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 20:44:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:39,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:44:39,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:39,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:44:39,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:44:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:39,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:39,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-26 20:44:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:39,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:44:39,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:44:39,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:44:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 161 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-26 20:44:39,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320738069] [2020-10-26 20:44:39,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:39,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:44:39,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859214154] [2020-10-26 20:44:39,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:44:39,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:44:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:44:39,597 INFO L87 Difference]: Start difference. First operand 92613 states and 117531 transitions. Second operand 5 states. [2020-10-26 20:44:39,849 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:42,129 INFO L93 Difference]: Finished difference Result 184915 states and 234390 transitions. [2020-10-26 20:44:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:44:42,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-26 20:44:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:42,783 INFO L225 Difference]: With dead ends: 184915 [2020-10-26 20:44:42,784 INFO L226 Difference]: Without dead ends: 92423 [2020-10-26 20:44:42,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:44:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92423 states. [2020-10-26 20:44:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92423 to 92187. [2020-10-26 20:44:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92187 states. [2020-10-26 20:44:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92187 states to 92187 states and 116714 transitions. [2020-10-26 20:44:45,779 INFO L78 Accepts]: Start accepts. Automaton has 92187 states and 116714 transitions. Word has length 329 [2020-10-26 20:44:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:45,780 INFO L481 AbstractCegarLoop]: Abstraction has 92187 states and 116714 transitions. [2020-10-26 20:44:45,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:44:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 92187 states and 116714 transitions. [2020-10-26 20:44:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-26 20:44:45,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:45,851 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:45,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:44:45,852 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1936862048, now seen corresponding path program 1 times [2020-10-26 20:44:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:45,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699298325] [2020-10-26 20:44:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:45,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:50,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:50,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-26 20:44:50,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:44:50,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 20:44:50,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:50,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:44:50,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:44:50,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:51,198 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:51,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:51,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:51,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:51,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:51,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:51,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:51,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:51,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:44:51,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:44:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:44:51,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:51,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:51,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:51,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:51,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:44:51,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:51,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 20:44:51,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:44:51,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:51,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:44:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:51,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:51,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:51,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:44:51,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 20:44:51,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 20:44:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:51,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 20:44:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:51,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:51,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:51,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:44:51,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:51,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:44:51,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:44:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:51,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 160 proven. 77 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 20:44:51,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699298325] [2020-10-26 20:44:51,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:51,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:44:51,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576510033] [2020-10-26 20:44:51,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:44:51,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:51,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:44:51,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:44:51,883 INFO L87 Difference]: Start difference. First operand 92187 states and 116714 transitions. Second operand 10 states. [2020-10-26 20:44:52,209 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:52,893 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 162 [2020-10-26 20:44:55,068 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:44:59,427 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:45:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:01,200 INFO L93 Difference]: Finished difference Result 261355 states and 342991 transitions. [2020-10-26 20:45:01,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 20:45:01,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 331 [2020-10-26 20:45:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:02,186 INFO L225 Difference]: With dead ends: 261355 [2020-10-26 20:45:02,187 INFO L226 Difference]: Without dead ends: 169289 [2020-10-26 20:45:02,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-26 20:45:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169289 states. [2020-10-26 20:45:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169289 to 167048. [2020-10-26 20:45:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167048 states. [2020-10-26 20:45:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167048 states to 167048 states and 210862 transitions. [2020-10-26 20:45:06,934 INFO L78 Accepts]: Start accepts. Automaton has 167048 states and 210862 transitions. Word has length 331 [2020-10-26 20:45:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:06,935 INFO L481 AbstractCegarLoop]: Abstraction has 167048 states and 210862 transitions. [2020-10-26 20:45:06,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:45:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 167048 states and 210862 transitions. [2020-10-26 20:45:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-10-26 20:45:07,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:07,009 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:07,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:45:07,009 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash 50902025, now seen corresponding path program 1 times [2020-10-26 20:45:07,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:07,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120217716] [2020-10-26 20:45:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:07,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:07,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking...