/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/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:55:26,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:55:26,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:55:26,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:55:26,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:55:26,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:55:26,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:55:26,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:55:26,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:55:26,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:55:26,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:55:26,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:55:26,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:55:26,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:55:26,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:55:26,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:55:26,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:55:26,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:55:26,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:55:26,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:55:26,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:55:26,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:55:26,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:55:26,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:55:26,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:55:26,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:55:26,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:55:26,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:55:26,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:55:26,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:55:26,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:55:26,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:55:26,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:55:26,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:55:26,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:55:26,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:55:26,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:55:26,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:55:26,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:55:26,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:55:26,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:55:26,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:55:26,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:55:26,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:55:26,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:55:26,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:55:26,737 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:55:26,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:55:26,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:55:26,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:55:26,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:55:26,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:55:26,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:55:26,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:55:26,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:55:26,741 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:55:26,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:55:26,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:55:26,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:55:26,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:55:26,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:55:26,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:55:26,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:55:26,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:55:26,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:55:26,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:55:26,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:55:26,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:55:26,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:55:26,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:55:26,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:55:26,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:55:27,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:55:27,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:55:27,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:55:27,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:55:27,221 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:55:27,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2020-10-27 01:55:27,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d214ff79/3289390e394844188f2a08f01deb8c1a/FLAGc53e407a4 [2020-10-27 01:55:27,874 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:55:27,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-1.c [2020-10-27 01:55:27,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d214ff79/3289390e394844188f2a08f01deb8c1a/FLAGc53e407a4 [2020-10-27 01:55:28,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d214ff79/3289390e394844188f2a08f01deb8c1a [2020-10-27 01:55:28,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:55:28,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:55:28,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:55:28,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:55:28,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:55:28,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4457362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28, skipping insertion in model container [2020-10-27 01:55:28,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:55:28,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:55:28,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:55:28,493 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:55:28,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:55:28,577 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:55:28,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28 WrapperNode [2020-10-27 01:55:28,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:55:28,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:55:28,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:55:28,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:55:28,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... [2020-10-27 01:55:28,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:55:28,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:55:28,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:55:28,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:55:28,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:55:28,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:55:28,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:55:28,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:55:28,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:55:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:55:28,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:55:28,759 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:55:28,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:55:28,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:55:28,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:55:28,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:55:28,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:55:28,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:55:28,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-27 01:55:28,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:55:28,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:55:29,208 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:55:29,209 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 01:55:29,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:55:29 BoogieIcfgContainer [2020-10-27 01:55:29,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:55:29,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:55:29,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:55:29,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:55:29,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:55:28" (1/3) ... [2020-10-27 01:55:29,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb5cb58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:55:29, skipping insertion in model container [2020-10-27 01:55:29,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:55:28" (2/3) ... [2020-10-27 01:55:29,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb5cb58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:55:29, skipping insertion in model container [2020-10-27 01:55:29,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:55:29" (3/3) ... [2020-10-27 01:55:29,219 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2020-10-27 01:55:29,232 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:55:29,237 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:55:29,250 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:55:29,277 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:55:29,277 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:55:29,277 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:55:29,277 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:55:29,277 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:55:29,278 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:55:29,278 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:55:29,278 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:55:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 01:55:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 01:55:29,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:29,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:29,299 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 910173467, now seen corresponding path program 1 times [2020-10-27 01:55:29,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:29,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111689303] [2020-10-27 01:55:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:29,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:29,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:29,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:55:29,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:29,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 01:55:29,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:55:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:29,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:29,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:29,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:29,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:29,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:55:29,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:29,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111689303] [2020-10-27 01:55:29,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:55:29,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:55:29,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529880671] [2020-10-27 01:55:29,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:55:29,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:29,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:55:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:55:29,791 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 01:55:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:29,916 INFO L93 Difference]: Finished difference Result 46 states and 67 transitions. [2020-10-27 01:55:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:55:29,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-27 01:55:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:29,926 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:55:29,926 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:55:29,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:55:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:55:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2020-10-27 01:55:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:55:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-27 01:55:29,964 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-27 01:55:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:29,965 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-27 01:55:29,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:55:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-27 01:55:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 01:55:29,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:29,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:29,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:55:29,966 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:29,967 INFO L82 PathProgramCache]: Analyzing trace with hash 909279737, now seen corresponding path program 1 times [2020-10-27 01:55:29,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:29,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642476788] [2020-10-27 01:55:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:30,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:30,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:30,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:55:30,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:30,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 01:55:30,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:55:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:55:30,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:30,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:30,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:30,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:30,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:30,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 01:55:30,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:55:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:30,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642476788] [2020-10-27 01:55:30,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:55:30,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:55:30,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565833971] [2020-10-27 01:55:30,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:55:30,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:30,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:55:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:55:30,329 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-27 01:55:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:30,501 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-10-27 01:55:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:55:30,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 01:55:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:30,502 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:55:30,503 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:55:30,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:55:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:55:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2020-10-27 01:55:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:55:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 01:55:30,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-10-27 01:55:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:30,512 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 01:55:30,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:55:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 01:55:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:55:30,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:30,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:30,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:55:30,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1010247195, now seen corresponding path program 1 times [2020-10-27 01:55:30,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:30,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501695483] [2020-10-27 01:55:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:30,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:30,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:30,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:55:30,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:55:30,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 01:55:30,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:55:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:55:30,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:55:30,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:30,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:30,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:30,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:30,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 01:55:30,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:30,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:30,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501695483] [2020-10-27 01:55:30,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:30,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:55:30,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102431728] [2020-10-27 01:55:30,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:55:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:30,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:55:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:55:30,920 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-27 01:55:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:31,137 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-27 01:55:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:55:31,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:55:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:31,139 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:55:31,139 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:55:31,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:55:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:55:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 23. [2020-10-27 01:55:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:55:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-27 01:55:31,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-10-27 01:55:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:31,149 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-27 01:55:31,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:55:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-27 01:55:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:55:31,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:31,151 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:31,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:55:31,151 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:31,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1840286023, now seen corresponding path program 2 times [2020-10-27 01:55:31,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:31,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420540932] [2020-10-27 01:55:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:31,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:31,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:31,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:31,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:55:31,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:55:31,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-27 01:55:31,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:55:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:55:31,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:31,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:31,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:31,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:31,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:31,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:31,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:55:31,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:31,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420540932] [2020-10-27 01:55:31,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:31,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:55:31,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386259040] [2020-10-27 01:55:31,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:55:31,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:31,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:55:31,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:55:31,771 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-10-27 01:55:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:32,077 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2020-10-27 01:55:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:55:32,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:55:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:32,079 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:55:32,079 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:55:32,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:55:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:55:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2020-10-27 01:55:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:55:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-27 01:55:32,089 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 16 [2020-10-27 01:55:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:32,090 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-27 01:55:32,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:55:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-27 01:55:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:55:32,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:32,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:32,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:55:32,091 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1982006949, now seen corresponding path program 3 times [2020-10-27 01:55:32,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:32,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139909439] [2020-10-27 01:55:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:32,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:32,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:32,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:32,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:32,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:55:32,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:55:32,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-27 01:55:32,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:55:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:55:32,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:33,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:33,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:33,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:33,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:33,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:33,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:33,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139909439] [2020-10-27 01:55:33,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:33,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:55:33,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003469883] [2020-10-27 01:55:33,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:55:33,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:33,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:55:33,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:55:33,067 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2020-10-27 01:55:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:33,469 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-10-27 01:55:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:55:33,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 01:55:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:33,471 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:55:33,471 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:55:33,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:55:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:55:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2020-10-27 01:55:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:55:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-27 01:55:33,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 19 [2020-10-27 01:55:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:33,484 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-27 01:55:33,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:55:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-27 01:55:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:55:33,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:33,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:33,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:55:33,487 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:33,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2037261447, now seen corresponding path program 4 times [2020-10-27 01:55:33,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:33,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219228296] [2020-10-27 01:55:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:33,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:33,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:33,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:33,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:35,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:35,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:55:35,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:55:35,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2020 [2020-10-27 01:55:35,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:35,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:55:35,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:35,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:55:35,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:35,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:35,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:35,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:35,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:35,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:55:35,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:35,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219228296] [2020-10-27 01:55:35,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:35,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:55:35,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959291499] [2020-10-27 01:55:35,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:55:35,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:55:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:55:35,683 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 8 states. [2020-10-27 01:55:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:36,226 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2020-10-27 01:55:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:55:36,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:55:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:36,228 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:55:36,228 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:55:36,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:55:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:55:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2020-10-27 01:55:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:55:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-10-27 01:55:36,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 22 [2020-10-27 01:55:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:36,250 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-10-27 01:55:36,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:55:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-10-27 01:55:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:55:36,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:36,252 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:36,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:55:36,252 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:36,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1143430299, now seen corresponding path program 5 times [2020-10-27 01:55:36,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:36,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877803934] [2020-10-27 01:55:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:36,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:36,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:36,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:36,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:40,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:40,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:55:40,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:55:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3851 [2020-10-27 01:55:40,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:55:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:55:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:40,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:40,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:40,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:40,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:40,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:40,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:40,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:40,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877803934] [2020-10-27 01:55:40,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:40,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:55:40,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025620074] [2020-10-27 01:55:40,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:55:40,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:55:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:55:40,297 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 9 states. [2020-10-27 01:55:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:41,015 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2020-10-27 01:55:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:55:41,015 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 01:55:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:41,017 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:55:41,017 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:55:41,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:55:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:55:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2020-10-27 01:55:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:55:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-27 01:55:41,041 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 25 [2020-10-27 01:55:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:41,042 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-27 01:55:41,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:55:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-27 01:55:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:55:41,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:41,044 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:41,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:55:41,044 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1562751033, now seen corresponding path program 6 times [2020-10-27 01:55:41,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:41,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71982080] [2020-10-27 01:55:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:41,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:41,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:41,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:41,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:41,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:46,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:46,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:55:46,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:55:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:55:46,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:55:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:55:46,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:55:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:46,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:46,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:46,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:46,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:46,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:46,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:46,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71982080] [2020-10-27 01:55:46,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:46,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:55:46,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245460638] [2020-10-27 01:55:46,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:55:46,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:55:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:55:46,249 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 10 states. [2020-10-27 01:55:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:46,982 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2020-10-27 01:55:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:55:46,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:55:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:46,984 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:55:46,984 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:55:46,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:55:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:55:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 53. [2020-10-27 01:55:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:55:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-27 01:55:47,008 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 28 [2020-10-27 01:55:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:47,008 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-27 01:55:47,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:55:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-27 01:55:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:55:47,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:47,009 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:47,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:55:47,010 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash -513126437, now seen corresponding path program 7 times [2020-10-27 01:55:47,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:47,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530909948] [2020-10-27 01:55:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:47,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:52,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:52,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:55:52,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:55:52,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:55:52,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:52,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:55:52,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:52,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:55:52,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:52,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:52,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:52,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:52,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:52,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:52,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:52,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:52,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:52,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:52,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:52,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530909948] [2020-10-27 01:55:52,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:52,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:55:52,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125775072] [2020-10-27 01:55:52,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:55:52,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:52,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:55:52,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:55:52,261 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 11 states. [2020-10-27 01:55:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:53,084 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2020-10-27 01:55:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:55:53,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:55:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:53,086 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:55:53,086 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:55:53,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:55:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:55:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 59. [2020-10-27 01:55:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:55:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-10-27 01:55:53,100 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 31 [2020-10-27 01:55:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:53,100 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-10-27 01:55:53,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:55:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-10-27 01:55:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:55:53,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:53,102 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:53,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:55:53,102 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash 255259897, now seen corresponding path program 8 times [2020-10-27 01:55:53,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:53,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201384462] [2020-10-27 01:55:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:53,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:53,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:53,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:53,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:58,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:58,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:55:58,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:55:58,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:55:58,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:55:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:55:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:55:58,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:58,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:58,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:58,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:58,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:58,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:58,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:58,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:58,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:58,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:55:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:58,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201384462] [2020-10-27 01:55:58,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:58,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:55:58,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046557422] [2020-10-27 01:55:58,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:55:58,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:55:58,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:55:58,387 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 12 states. [2020-10-27 01:55:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:59,539 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-27 01:55:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:55:59,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 01:55:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:59,542 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:55:59,543 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:55:59,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:55:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:55:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2020-10-27 01:55:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:55:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2020-10-27 01:55:59,558 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 34 [2020-10-27 01:55:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:59,558 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2020-10-27 01:55:59,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:55:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2020-10-27 01:55:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:55:59,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:59,560 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:59,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:55:59,560 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash -923151589, now seen corresponding path program 9 times [2020-10-27 01:55:59,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:59,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311323154] [2020-10-27 01:55:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:59,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:59,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:59,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:59,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:59,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:59,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:59,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:00,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:04,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:04,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:56:04,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:56:04,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:56:04,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:04,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:56:04,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:04,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:56:04,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:04,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:04,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:04,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:04,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:04,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:04,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311323154] [2020-10-27 01:56:04,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:04,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:56:04,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611590053] [2020-10-27 01:56:04,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:56:04,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:56:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:56:04,828 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand 13 states. [2020-10-27 01:56:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:06,093 INFO L93 Difference]: Finished difference Result 136 states and 182 transitions. [2020-10-27 01:56:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:56:06,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 01:56:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:06,096 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:56:06,096 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:56:06,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:56:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:56:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 71. [2020-10-27 01:56:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:56:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-10-27 01:56:06,112 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 37 [2020-10-27 01:56:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:06,112 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-10-27 01:56:06,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:56:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-10-27 01:56:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:56:06,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:06,114 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:06,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:56:06,114 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash 82946489, now seen corresponding path program 10 times [2020-10-27 01:56:06,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:06,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15231970] [2020-10-27 01:56:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:06,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:07,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:11,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:11,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:56:11,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:56:11,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:56:11,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:56:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:56:11,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:11,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:11,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:11,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:11,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:11,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:11,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:11,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:11,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:11,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:11,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:11,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15231970] [2020-10-27 01:56:11,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:11,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:56:11,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201161369] [2020-10-27 01:56:11,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:56:11,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:11,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:56:11,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:56:11,405 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 14 states. [2020-10-27 01:56:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:12,853 INFO L93 Difference]: Finished difference Result 147 states and 197 transitions. [2020-10-27 01:56:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:56:12,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 01:56:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:12,857 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:56:12,857 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 01:56:12,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:56:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 01:56:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 77. [2020-10-27 01:56:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:56:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2020-10-27 01:56:12,884 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 40 [2020-10-27 01:56:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:12,886 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2020-10-27 01:56:12,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:56:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2020-10-27 01:56:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:56:12,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:12,895 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:12,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:56:12,896 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1825970597, now seen corresponding path program 11 times [2020-10-27 01:56:12,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:12,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745192742] [2020-10-27 01:56:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:12,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:12,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:12,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:12,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:12,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:12,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:13,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:13,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:15,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:15,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:56:17,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:18,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:18,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:18,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:18,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:18,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:18,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:18,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:18,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:18,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745192742] [2020-10-27 01:56:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:18,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:56:18,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623124973] [2020-10-27 01:56:18,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:56:18,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:18,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:56:18,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:56:18,203 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand 15 states. [2020-10-27 01:56:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:19,857 INFO L93 Difference]: Finished difference Result 158 states and 212 transitions. [2020-10-27 01:56:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:56:19,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 01:56:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:19,860 INFO L225 Difference]: With dead ends: 158 [2020-10-27 01:56:19,860 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 01:56:19,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:56:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 01:56:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 83. [2020-10-27 01:56:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:56:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2020-10-27 01:56:19,875 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 43 [2020-10-27 01:56:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:19,876 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2020-10-27 01:56:19,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:56:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2020-10-27 01:56:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:56:19,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:19,877 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:19,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:56:19,878 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:19,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -712913287, now seen corresponding path program 12 times [2020-10-27 01:56:19,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:19,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021778367] [2020-10-27 01:56:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:19,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:19,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:19,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:19,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:20,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:20,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:21,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:24,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:56:24,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:56:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:56:24,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:56:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:56:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:24,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:24,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:24,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:24,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:24,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:24,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:24,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:24,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:24,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-27 01:56:24,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021778367] [2020-10-27 01:56:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:56:24,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:56:24,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120957943] [2020-10-27 01:56:24,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:56:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:56:24,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:56:24,975 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand 4 states. [2020-10-27 01:56:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:25,122 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2020-10-27 01:56:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:56:25,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-27 01:56:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:25,125 INFO L225 Difference]: With dead ends: 300 [2020-10-27 01:56:25,125 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 01:56:25,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:56:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 01:56:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 95. [2020-10-27 01:56:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:56:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2020-10-27 01:56:25,145 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 46 [2020-10-27 01:56:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:25,145 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2020-10-27 01:56:25,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:56:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2020-10-27 01:56:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:56:25,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:25,147 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:25,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:56:25,148 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1968147113, now seen corresponding path program 1 times [2020-10-27 01:56:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:25,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038744287] [2020-10-27 01:56:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:25,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:30,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:56:30,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:56:30,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 01:56:30,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:30,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:56:30,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:30,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:56:30,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:30,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:30,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:30,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:30,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:30,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:30,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:30,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:30,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:30,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:30,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-10-27 01:56:30,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038744287] [2020-10-27 01:56:30,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:30,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:56:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871927977] [2020-10-27 01:56:30,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:56:30,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:56:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:56:30,327 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand 5 states. [2020-10-27 01:56:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:30,541 INFO L93 Difference]: Finished difference Result 395 states and 538 transitions. [2020-10-27 01:56:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:56:30,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-27 01:56:30,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:30,543 INFO L225 Difference]: With dead ends: 395 [2020-10-27 01:56:30,543 INFO L226 Difference]: Without dead ends: 312 [2020-10-27 01:56:30,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:56:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-27 01:56:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 143. [2020-10-27 01:56:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:56:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2020-10-27 01:56:30,576 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 82 [2020-10-27 01:56:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:30,578 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2020-10-27 01:56:30,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:56:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2020-10-27 01:56:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 01:56:30,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:30,579 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:30,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:56:30,580 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:30,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2101790585, now seen corresponding path program 2 times [2020-10-27 01:56:30,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:30,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831662331] [2020-10-27 01:56:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:35,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 01:56:35,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 01:56:35,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 01:56:35,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:56:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:56:35,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:35,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:35,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:35,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:35,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:35,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:35,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 199 proven. 5 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-27 01:56:35,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831662331] [2020-10-27 01:56:35,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:35,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:56:35,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116909155] [2020-10-27 01:56:35,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:56:35,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:56:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:56:35,777 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand 6 states. [2020-10-27 01:56:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:36,116 INFO L93 Difference]: Finished difference Result 523 states and 701 transitions. [2020-10-27 01:56:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:56:36,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2020-10-27 01:56:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:36,119 INFO L225 Difference]: With dead ends: 523 [2020-10-27 01:56:36,119 INFO L226 Difference]: Without dead ends: 396 [2020-10-27 01:56:36,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:56:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-27 01:56:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 191. [2020-10-27 01:56:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 01:56:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 239 transitions. [2020-10-27 01:56:36,160 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 239 transitions. Word has length 118 [2020-10-27 01:56:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:36,160 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 239 transitions. [2020-10-27 01:56:36,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:56:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 239 transitions. [2020-10-27 01:56:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 01:56:36,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:36,162 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:36,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:56:36,163 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash -323802199, now seen corresponding path program 3 times [2020-10-27 01:56:36,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:36,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633663680] [2020-10-27 01:56:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:36,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:37,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:41,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:41,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 01:56:41,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 01:56:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 01:56:41,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:56:41,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:41,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:56:41,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:41,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:41,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:41,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 386 proven. 12 refuted. 0 times theorem prover too weak. 2134 trivial. 0 not checked. [2020-10-27 01:56:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633663680] [2020-10-27 01:56:41,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:41,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:56:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622623625] [2020-10-27 01:56:41,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:56:41,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:41,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:56:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:56:41,380 INFO L87 Difference]: Start difference. First operand 191 states and 239 transitions. Second operand 7 states. [2020-10-27 01:56:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:41,798 INFO L93 Difference]: Finished difference Result 651 states and 864 transitions. [2020-10-27 01:56:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:56:41,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-10-27 01:56:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:41,801 INFO L225 Difference]: With dead ends: 651 [2020-10-27 01:56:41,801 INFO L226 Difference]: Without dead ends: 480 [2020-10-27 01:56:41,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:56:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-10-27 01:56:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 239. [2020-10-27 01:56:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 01:56:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 299 transitions. [2020-10-27 01:56:41,852 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 299 transitions. Word has length 154 [2020-10-27 01:56:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:41,852 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 299 transitions. [2020-10-27 01:56:41,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:56:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 299 transitions. [2020-10-27 01:56:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-27 01:56:41,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:41,855 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:41,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:56:41,855 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1052000377, now seen corresponding path program 4 times [2020-10-27 01:56:41,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:41,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666949905] [2020-10-27 01:56:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:41,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:44,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:44,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:56:46,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:47,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:47,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:47,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:47,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:47,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:47,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:47,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:47,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4170 backedges. 639 proven. 22 refuted. 0 times theorem prover too weak. 3509 trivial. 0 not checked. [2020-10-27 01:56:47,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666949905] [2020-10-27 01:56:47,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:47,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:56:47,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399756598] [2020-10-27 01:56:47,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:56:47,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:47,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:56:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:56:47,094 INFO L87 Difference]: Start difference. First operand 239 states and 299 transitions. Second operand 8 states. [2020-10-27 01:56:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:47,624 INFO L93 Difference]: Finished difference Result 779 states and 1027 transitions. [2020-10-27 01:56:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:56:47,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 190 [2020-10-27 01:56:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:47,628 INFO L225 Difference]: With dead ends: 779 [2020-10-27 01:56:47,628 INFO L226 Difference]: Without dead ends: 564 [2020-10-27 01:56:47,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:56:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-27 01:56:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 287. [2020-10-27 01:56:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-27 01:56:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 359 transitions. [2020-10-27 01:56:47,685 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 359 transitions. Word has length 190 [2020-10-27 01:56:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:47,685 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 359 transitions. [2020-10-27 01:56:47,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:56:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 359 transitions. [2020-10-27 01:56:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-27 01:56:47,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:47,688 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:47,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:56:47,688 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1562266793, now seen corresponding path program 5 times [2020-10-27 01:56:47,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:47,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120930828] [2020-10-27 01:56:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:47,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:47,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:52,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:56:52,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:52,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:52,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:52,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:52,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:52,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:56:52,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:52,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 958 proven. 35 refuted. 0 times theorem prover too weak. 5247 trivial. 0 not checked. [2020-10-27 01:56:52,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120930828] [2020-10-27 01:56:52,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:52,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:56:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018993292] [2020-10-27 01:56:52,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:56:52,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:56:52,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:56:52,965 INFO L87 Difference]: Start difference. First operand 287 states and 359 transitions. Second operand 9 states. [2020-10-27 01:56:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:53,634 INFO L93 Difference]: Finished difference Result 907 states and 1190 transitions. [2020-10-27 01:56:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:56:53,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 226 [2020-10-27 01:56:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:53,638 INFO L225 Difference]: With dead ends: 907 [2020-10-27 01:56:53,639 INFO L226 Difference]: Without dead ends: 648 [2020-10-27 01:56:53,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:56:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-10-27 01:56:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 335. [2020-10-27 01:56:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-27 01:56:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 419 transitions. [2020-10-27 01:56:53,707 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 419 transitions. Word has length 226 [2020-10-27 01:56:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:53,707 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 419 transitions. [2020-10-27 01:56:53,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:56:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 419 transitions. [2020-10-27 01:56:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-27 01:56:53,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:53,711 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:53,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:56:53,711 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash -695584391, now seen corresponding path program 6 times [2020-10-27 01:56:53,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:53,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580650475] [2020-10-27 01:56:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:53,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:56:58,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:58,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:58,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:58,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 1343 proven. 51 refuted. 0 times theorem prover too weak. 7348 trivial. 0 not checked. [2020-10-27 01:56:59,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580650475] [2020-10-27 01:56:59,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:59,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:56:59,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368789850] [2020-10-27 01:56:59,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:56:59,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:56:59,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:56:59,043 INFO L87 Difference]: Start difference. First operand 335 states and 419 transitions. Second operand 10 states. [2020-10-27 01:56:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:59,788 INFO L93 Difference]: Finished difference Result 1035 states and 1353 transitions. [2020-10-27 01:56:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:56:59,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 262 [2020-10-27 01:56:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:59,794 INFO L225 Difference]: With dead ends: 1035 [2020-10-27 01:56:59,794 INFO L226 Difference]: Without dead ends: 732 [2020-10-27 01:56:59,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:56:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-10-27 01:56:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 383. [2020-10-27 01:56:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-27 01:56:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 479 transitions. [2020-10-27 01:56:59,867 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 479 transitions. Word has length 262 [2020-10-27 01:56:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:59,867 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 479 transitions. [2020-10-27 01:56:59,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:56:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 479 transitions. [2020-10-27 01:56:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-27 01:56:59,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:59,871 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:59,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:56:59,871 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:59,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2133791319, now seen corresponding path program 7 times [2020-10-27 01:56:59,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:59,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96298467] [2020-10-27 01:56:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:00,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:01,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:04,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:05,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-27 01:57:05,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 01:57:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 01:57:05,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:57:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:57:05,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:05,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:05,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:05,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:05,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:05,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:05,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11676 backedges. 1794 proven. 70 refuted. 0 times theorem prover too weak. 9812 trivial. 0 not checked. [2020-10-27 01:57:05,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96298467] [2020-10-27 01:57:05,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:05,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:57:05,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701115449] [2020-10-27 01:57:05,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:57:05,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:05,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:57:05,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:57:05,264 INFO L87 Difference]: Start difference. First operand 383 states and 479 transitions. Second operand 11 states. [2020-10-27 01:57:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:06,193 INFO L93 Difference]: Finished difference Result 1163 states and 1516 transitions. [2020-10-27 01:57:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:57:06,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 298 [2020-10-27 01:57:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:06,199 INFO L225 Difference]: With dead ends: 1163 [2020-10-27 01:57:06,199 INFO L226 Difference]: Without dead ends: 816 [2020-10-27 01:57:06,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:57:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-27 01:57:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 431. [2020-10-27 01:57:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-27 01:57:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 539 transitions. [2020-10-27 01:57:06,281 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 539 transitions. Word has length 298 [2020-10-27 01:57:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:06,281 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 539 transitions. [2020-10-27 01:57:06,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:57:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 539 transitions. [2020-10-27 01:57:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-27 01:57:06,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:06,284 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:06,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:57:06,284 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:06,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:06,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1450659207, now seen corresponding path program 8 times [2020-10-27 01:57:06,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:06,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103641768] [2020-10-27 01:57:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:06,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:11,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-27 01:57:11,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:57:11,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 01:57:11,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:11,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:57:11,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:11,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:57:11,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:11,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:11,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:11,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:11,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:11,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:11,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15042 backedges. 2311 proven. 92 refuted. 0 times theorem prover too weak. 12639 trivial. 0 not checked. [2020-10-27 01:57:11,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103641768] [2020-10-27 01:57:11,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:11,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:57:11,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358150480] [2020-10-27 01:57:11,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:57:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:57:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:57:11,727 INFO L87 Difference]: Start difference. First operand 431 states and 539 transitions. Second operand 12 states. [2020-10-27 01:57:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:12,772 INFO L93 Difference]: Finished difference Result 1291 states and 1679 transitions. [2020-10-27 01:57:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:57:12,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 334 [2020-10-27 01:57:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:12,780 INFO L225 Difference]: With dead ends: 1291 [2020-10-27 01:57:12,780 INFO L226 Difference]: Without dead ends: 900 [2020-10-27 01:57:12,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:57:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2020-10-27 01:57:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 479. [2020-10-27 01:57:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-27 01:57:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 599 transitions. [2020-10-27 01:57:12,899 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 599 transitions. Word has length 334 [2020-10-27 01:57:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:12,899 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 599 transitions. [2020-10-27 01:57:12,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:57:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 599 transitions. [2020-10-27 01:57:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-27 01:57:12,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:12,902 INFO L422 BasicCegarLoop]: trace histogram [108, 108, 108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:12,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:57:12,903 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:12,903 INFO L82 PathProgramCache]: Analyzing trace with hash -368374103, now seen corresponding path program 9 times [2020-10-27 01:57:12,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:12,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818259357] [2020-10-27 01:57:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:13,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:13,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:13,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:13,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:13,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:13,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:13,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:16,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:57:18,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:18,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:18,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:18,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:18,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:18,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:18,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:18,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18840 backedges. 2894 proven. 117 refuted. 0 times theorem prover too weak. 15829 trivial. 0 not checked. [2020-10-27 01:57:18,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818259357] [2020-10-27 01:57:18,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:18,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:57:18,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742065762] [2020-10-27 01:57:18,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:57:18,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:18,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:57:18,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:57:18,639 INFO L87 Difference]: Start difference. First operand 479 states and 599 transitions. Second operand 13 states. [2020-10-27 01:57:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:20,049 INFO L93 Difference]: Finished difference Result 1419 states and 1842 transitions. [2020-10-27 01:57:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:57:20,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 370 [2020-10-27 01:57:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:20,054 INFO L225 Difference]: With dead ends: 1419 [2020-10-27 01:57:20,055 INFO L226 Difference]: Without dead ends: 984 [2020-10-27 01:57:20,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:57:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-10-27 01:57:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 527. [2020-10-27 01:57:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-27 01:57:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 659 transitions. [2020-10-27 01:57:20,214 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 659 transitions. Word has length 370 [2020-10-27 01:57:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:20,214 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 659 transitions. [2020-10-27 01:57:20,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:57:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 659 transitions. [2020-10-27 01:57:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-10-27 01:57:20,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:20,217 INFO L422 BasicCegarLoop]: trace histogram [120, 120, 120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:20,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:57:20,218 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash -999314567, now seen corresponding path program 10 times [2020-10-27 01:57:20,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:20,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844209942] [2020-10-27 01:57:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:20,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:20,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:25,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-10-27 01:57:25,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 01:57:25,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-27 01:57:25,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:25,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:57:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:57:25,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:25,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:25,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:25,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:25,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:25,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:57:25,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:25,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:25,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:25,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:25,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 23070 backedges. 3543 proven. 145 refuted. 0 times theorem prover too weak. 19382 trivial. 0 not checked. [2020-10-27 01:57:25,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844209942] [2020-10-27 01:57:25,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:25,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:57:25,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817403305] [2020-10-27 01:57:25,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:57:25,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:25,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:57:25,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:57:25,909 INFO L87 Difference]: Start difference. First operand 527 states and 659 transitions. Second operand 14 states. [2020-10-27 01:57:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:27,336 INFO L93 Difference]: Finished difference Result 1547 states and 2005 transitions. [2020-10-27 01:57:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:57:27,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 406 [2020-10-27 01:57:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:27,342 INFO L225 Difference]: With dead ends: 1547 [2020-10-27 01:57:27,342 INFO L226 Difference]: Without dead ends: 1068 [2020-10-27 01:57:27,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:57:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-10-27 01:57:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 575. [2020-10-27 01:57:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-10-27 01:57:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 719 transitions. [2020-10-27 01:57:27,502 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 719 transitions. Word has length 406 [2020-10-27 01:57:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:27,503 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 719 transitions. [2020-10-27 01:57:27,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:57:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 719 transitions. [2020-10-27 01:57:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-10-27 01:57:27,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:27,506 INFO L422 BasicCegarLoop]: trace histogram [132, 132, 132, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:27,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:57:27,507 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash 51163049, now seen corresponding path program 11 times [2020-10-27 01:57:27,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:27,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327474042] [2020-10-27 01:57:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:30,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:32,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 450 [2020-10-27 01:57:32,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 01:57:32,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-27 01:57:32,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:32,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:57:32,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:32,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:57:32,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:33,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:33,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:33,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:33,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:33,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27732 backedges. 4258 proven. 176 refuted. 0 times theorem prover too weak. 23298 trivial. 0 not checked. [2020-10-27 01:57:33,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327474042] [2020-10-27 01:57:33,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:33,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:57:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061667535] [2020-10-27 01:57:33,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:57:33,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:57:33,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:57:33,305 INFO L87 Difference]: Start difference. First operand 575 states and 719 transitions. Second operand 15 states. [2020-10-27 01:57:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:34,876 INFO L93 Difference]: Finished difference Result 1675 states and 2168 transitions. [2020-10-27 01:57:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:57:34,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 442 [2020-10-27 01:57:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:34,882 INFO L225 Difference]: With dead ends: 1675 [2020-10-27 01:57:34,882 INFO L226 Difference]: Without dead ends: 1152 [2020-10-27 01:57:34,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:57:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2020-10-27 01:57:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 623. [2020-10-27 01:57:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-10-27 01:57:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 779 transitions. [2020-10-27 01:57:35,054 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 779 transitions. Word has length 442 [2020-10-27 01:57:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:35,054 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 779 transitions. [2020-10-27 01:57:35,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:57:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 779 transitions. [2020-10-27 01:57:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-27 01:57:35,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:35,058 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 144, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:35,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:57:35,058 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash -604035975, now seen corresponding path program 12 times [2020-10-27 01:57:35,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:35,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653703111] [2020-10-27 01:57:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:35,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:35,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:36,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 486 [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:57:40,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:40,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:40,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:40,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:40,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:40,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:40,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:40,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:40,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:40,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32826 backedges. 5039 proven. 210 refuted. 0 times theorem prover too weak. 27577 trivial. 0 not checked. [2020-10-27 01:57:40,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653703111] [2020-10-27 01:57:40,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:40,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:57:40,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992771693] [2020-10-27 01:57:40,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:57:40,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:57:40,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:57:40,820 INFO L87 Difference]: Start difference. First operand 623 states and 779 transitions. Second operand 16 states. [2020-10-27 01:57:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:42,629 INFO L93 Difference]: Finished difference Result 1803 states and 2331 transitions. [2020-10-27 01:57:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:57:42,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 478 [2020-10-27 01:57:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:42,635 INFO L225 Difference]: With dead ends: 1803 [2020-10-27 01:57:42,635 INFO L226 Difference]: Without dead ends: 1236 [2020-10-27 01:57:42,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:57:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-10-27 01:57:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 671. [2020-10-27 01:57:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2020-10-27 01:57:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 839 transitions. [2020-10-27 01:57:42,824 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 839 transitions. Word has length 478 [2020-10-27 01:57:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:42,824 INFO L481 AbstractCegarLoop]: Abstraction has 671 states and 839 transitions. [2020-10-27 01:57:42,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:57:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 839 transitions. [2020-10-27 01:57:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-10-27 01:57:42,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:42,829 INFO L422 BasicCegarLoop]: trace histogram [156, 156, 156, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:42,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:57:42,829 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:42,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:42,832 INFO L82 PathProgramCache]: Analyzing trace with hash 236310697, now seen corresponding path program 13 times [2020-10-27 01:57:42,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:42,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519972950] [2020-10-27 01:57:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:43,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:44,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:46,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:46,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:48,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:48,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 522 [2020-10-27 01:57:48,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 01:57:48,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-27 01:57:48,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:57:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:57:48,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:48,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:48,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:48,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:48,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:48,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:48,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:48,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:48,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:48,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:48,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 38352 backedges. 5886 proven. 247 refuted. 0 times theorem prover too weak. 32219 trivial. 0 not checked. [2020-10-27 01:57:48,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519972950] [2020-10-27 01:57:48,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:48,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:57:48,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694065479] [2020-10-27 01:57:48,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:57:48,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:57:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:57:48,671 INFO L87 Difference]: Start difference. First operand 671 states and 839 transitions. Second operand 17 states. [2020-10-27 01:57:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:50,634 INFO L93 Difference]: Finished difference Result 1931 states and 2494 transitions. [2020-10-27 01:57:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:57:50,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 514 [2020-10-27 01:57:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:50,640 INFO L225 Difference]: With dead ends: 1931 [2020-10-27 01:57:50,640 INFO L226 Difference]: Without dead ends: 1320 [2020-10-27 01:57:50,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:57:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-10-27 01:57:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 719. [2020-10-27 01:57:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2020-10-27 01:57:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 899 transitions. [2020-10-27 01:57:50,836 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 899 transitions. Word has length 514 [2020-10-27 01:57:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:50,836 INFO L481 AbstractCegarLoop]: Abstraction has 719 states and 899 transitions. [2020-10-27 01:57:50,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:57:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 899 transitions. [2020-10-27 01:57:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2020-10-27 01:57:50,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:50,841 INFO L422 BasicCegarLoop]: trace histogram [168, 168, 168, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:50,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:57:50,841 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:50,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1291263353, now seen corresponding path program 14 times [2020-10-27 01:57:50,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:50,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146648829] [2020-10-27 01:57:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:51,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:51,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:51,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:56,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 558 [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:57:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:56,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:56,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:56,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:56,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:56,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:56,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:56,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:56,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 44310 backedges. 6799 proven. 287 refuted. 0 times theorem prover too weak. 37224 trivial. 0 not checked. [2020-10-27 01:57:56,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146648829] [2020-10-27 01:57:56,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:56,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:57:56,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697190251] [2020-10-27 01:57:56,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:57:56,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:57:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:57:56,690 INFO L87 Difference]: Start difference. First operand 719 states and 899 transitions. Second operand 18 states. [2020-10-27 01:57:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:58,919 INFO L93 Difference]: Finished difference Result 2059 states and 2657 transitions. [2020-10-27 01:57:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:57:58,921 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 550 [2020-10-27 01:57:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:58,926 INFO L225 Difference]: With dead ends: 2059 [2020-10-27 01:57:58,926 INFO L226 Difference]: Without dead ends: 1404 [2020-10-27 01:57:58,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:57:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2020-10-27 01:57:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 767. [2020-10-27 01:57:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-27 01:57:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 959 transitions. [2020-10-27 01:57:59,139 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 959 transitions. Word has length 550 [2020-10-27 01:57:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:59,140 INFO L481 AbstractCegarLoop]: Abstraction has 767 states and 959 transitions. [2020-10-27 01:57:59,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:57:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 959 transitions. [2020-10-27 01:57:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-10-27 01:57:59,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:59,145 INFO L422 BasicCegarLoop]: trace histogram [180, 180, 180, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:59,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:57:59,146 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:59,146 INFO L82 PathProgramCache]: Analyzing trace with hash 627470761, now seen corresponding path program 15 times [2020-10-27 01:57:59,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:59,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213226414] [2020-10-27 01:57:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:59,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:02,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:02,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:02,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:02,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:02,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:03,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:03,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:04,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:04,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 594 [2020-10-27 01:58:04,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 01:58:04,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-27 01:58:04,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:58:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:04,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:58:04,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:04,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:04,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:04,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:04,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:04,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:04,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:04,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:04,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:04,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:04,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:04,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 50700 backedges. 7778 proven. 330 refuted. 0 times theorem prover too weak. 42592 trivial. 0 not checked. [2020-10-27 01:58:05,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213226414] [2020-10-27 01:58:05,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:05,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:58:05,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750057555] [2020-10-27 01:58:05,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:58:05,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:58:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:58:05,155 INFO L87 Difference]: Start difference. First operand 767 states and 959 transitions. Second operand 19 states. [2020-10-27 01:58:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:07,585 INFO L93 Difference]: Finished difference Result 2187 states and 2820 transitions. [2020-10-27 01:58:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:58:07,586 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 586 [2020-10-27 01:58:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:07,592 INFO L225 Difference]: With dead ends: 2187 [2020-10-27 01:58:07,592 INFO L226 Difference]: Without dead ends: 1488 [2020-10-27 01:58:07,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:58:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2020-10-27 01:58:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 815. [2020-10-27 01:58:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 815 states. [2020-10-27 01:58:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1019 transitions. [2020-10-27 01:58:07,845 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1019 transitions. Word has length 586 [2020-10-27 01:58:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:07,845 INFO L481 AbstractCegarLoop]: Abstraction has 815 states and 1019 transitions. [2020-10-27 01:58:07,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:58:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1019 transitions. [2020-10-27 01:58:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2020-10-27 01:58:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:07,851 INFO L422 BasicCegarLoop]: trace histogram [192, 192, 192, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:07,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:58:07,851 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:07,851 INFO L82 PathProgramCache]: Analyzing trace with hash 471307897, now seen corresponding path program 16 times [2020-10-27 01:58:07,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:07,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656319645] [2020-10-27 01:58:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:08,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:09,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:09,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:13,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:13,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 630 [2020-10-27 01:58:13,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 01:58:13,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-27 01:58:13,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:58:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:58:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:13,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:13,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:13,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 57522 backedges. 8823 proven. 376 refuted. 0 times theorem prover too weak. 48323 trivial. 0 not checked. [2020-10-27 01:58:14,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656319645] [2020-10-27 01:58:14,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:14,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:58:14,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313114349] [2020-10-27 01:58:14,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:58:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:58:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:58:14,059 INFO L87 Difference]: Start difference. First operand 815 states and 1019 transitions. Second operand 20 states. [2020-10-27 01:58:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:16,641 INFO L93 Difference]: Finished difference Result 2315 states and 2983 transitions. [2020-10-27 01:58:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:58:16,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 622 [2020-10-27 01:58:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:16,649 INFO L225 Difference]: With dead ends: 2315 [2020-10-27 01:58:16,649 INFO L226 Difference]: Without dead ends: 1572 [2020-10-27 01:58:16,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:58:16,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2020-10-27 01:58:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 863. [2020-10-27 01:58:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-10-27 01:58:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1079 transitions. [2020-10-27 01:58:16,909 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1079 transitions. Word has length 622 [2020-10-27 01:58:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:16,909 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1079 transitions. [2020-10-27 01:58:16,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:58:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1079 transitions. [2020-10-27 01:58:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2020-10-27 01:58:16,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:16,915 INFO L422 BasicCegarLoop]: trace histogram [204, 204, 204, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:16,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:58:16,915 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash 993956521, now seen corresponding path program 17 times [2020-10-27 01:58:16,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:16,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462931334] [2020-10-27 01:58:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:17,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:18,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:22,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:22,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 666 [2020-10-27 01:58:22,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-27 01:58:22,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 01:58:22,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:22,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:58:22,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:22,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:58:22,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:22,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:22,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:22,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64776 backedges. 9934 proven. 425 refuted. 0 times theorem prover too weak. 54417 trivial. 0 not checked. [2020-10-27 01:58:23,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462931334] [2020-10-27 01:58:23,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:23,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:58:23,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217584065] [2020-10-27 01:58:23,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:58:23,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:23,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:58:23,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:58:23,082 INFO L87 Difference]: Start difference. First operand 863 states and 1079 transitions. Second operand 21 states. [2020-10-27 01:58:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:26,037 INFO L93 Difference]: Finished difference Result 2443 states and 3146 transitions. [2020-10-27 01:58:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:58:26,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 658 [2020-10-27 01:58:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:26,044 INFO L225 Difference]: With dead ends: 2443 [2020-10-27 01:58:26,044 INFO L226 Difference]: Without dead ends: 1656 [2020-10-27 01:58:26,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:58:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2020-10-27 01:58:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 911. [2020-10-27 01:58:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 911 states. [2020-10-27 01:58:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1139 transitions. [2020-10-27 01:58:26,390 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1139 transitions. Word has length 658 [2020-10-27 01:58:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:26,391 INFO L481 AbstractCegarLoop]: Abstraction has 911 states and 1139 transitions. [2020-10-27 01:58:26,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:58:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1139 transitions. [2020-10-27 01:58:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2020-10-27 01:58:26,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:26,397 INFO L422 BasicCegarLoop]: trace histogram [216, 216, 216, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:26,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:58:26,397 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash -165638279, now seen corresponding path program 18 times [2020-10-27 01:58:26,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:26,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387172841] [2020-10-27 01:58:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 702 [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:58:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:32,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:32,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:32,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:32,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:32,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:32,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:32,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 72462 backedges. 11111 proven. 477 refuted. 0 times theorem prover too weak. 60874 trivial. 0 not checked. [2020-10-27 01:58:32,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387172841] [2020-10-27 01:58:32,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:32,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:58:32,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013609101] [2020-10-27 01:58:32,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:58:32,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:58:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:58:32,579 INFO L87 Difference]: Start difference. First operand 911 states and 1139 transitions. Second operand 22 states. [2020-10-27 01:58:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:35,769 INFO L93 Difference]: Finished difference Result 2571 states and 3309 transitions. [2020-10-27 01:58:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:58:35,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 694 [2020-10-27 01:58:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:35,777 INFO L225 Difference]: With dead ends: 2571 [2020-10-27 01:58:35,777 INFO L226 Difference]: Without dead ends: 1740 [2020-10-27 01:58:35,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:58:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2020-10-27 01:58:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 959. [2020-10-27 01:58:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-10-27 01:58:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1199 transitions. [2020-10-27 01:58:36,010 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1199 transitions. Word has length 694 [2020-10-27 01:58:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:36,010 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 1199 transitions. [2020-10-27 01:58:36,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:58:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1199 transitions. [2020-10-27 01:58:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2020-10-27 01:58:36,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:36,017 INFO L422 BasicCegarLoop]: trace histogram [228, 228, 228, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:36,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:58:36,017 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash 433992617, now seen corresponding path program 19 times [2020-10-27 01:58:36,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:36,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986439633] [2020-10-27 01:58:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:36,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:41,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 738 [2020-10-27 01:58:41,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-27 01:58:41,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 01:58:41,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:58:41,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:41,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:58:41,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:42,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 80580 backedges. 12354 proven. 532 refuted. 0 times theorem prover too weak. 67694 trivial. 0 not checked. [2020-10-27 01:58:42,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986439633] [2020-10-27 01:58:42,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:42,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:58:42,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747103056] [2020-10-27 01:58:42,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:58:42,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:42,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:58:42,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:58:42,250 INFO L87 Difference]: Start difference. First operand 959 states and 1199 transitions. Second operand 23 states. [2020-10-27 01:58:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:45,683 INFO L93 Difference]: Finished difference Result 2699 states and 3472 transitions. [2020-10-27 01:58:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:58:45,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 730 [2020-10-27 01:58:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:45,691 INFO L225 Difference]: With dead ends: 2699 [2020-10-27 01:58:45,691 INFO L226 Difference]: Without dead ends: 1824 [2020-10-27 01:58:45,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:58:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2020-10-27 01:58:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1007. [2020-10-27 01:58:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1007 states. [2020-10-27 01:58:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1259 transitions. [2020-10-27 01:58:45,987 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1259 transitions. Word has length 730 [2020-10-27 01:58:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:45,987 INFO L481 AbstractCegarLoop]: Abstraction has 1007 states and 1259 transitions. [2020-10-27 01:58:45,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:58:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1259 transitions. [2020-10-27 01:58:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2020-10-27 01:58:45,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:45,995 INFO L422 BasicCegarLoop]: trace histogram [240, 240, 240, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:45,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:58:45,995 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 802293881, now seen corresponding path program 20 times [2020-10-27 01:58:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:45,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195412384] [2020-10-27 01:58:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:46,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:49,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:49,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:51,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 774 [2020-10-27 01:58:51,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 01:58:51,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 01:58:51,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:58:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:58:51,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:52,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:52,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:52,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 89130 backedges. 13663 proven. 590 refuted. 0 times theorem prover too weak. 74877 trivial. 0 not checked. [2020-10-27 01:58:52,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195412384] [2020-10-27 01:58:52,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:52,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:58:52,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6342656] [2020-10-27 01:58:52,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:58:52,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:52,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:58:52,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:58:52,463 INFO L87 Difference]: Start difference. First operand 1007 states and 1259 transitions. Second operand 24 states. [2020-10-27 01:58:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:56,229 INFO L93 Difference]: Finished difference Result 2827 states and 3635 transitions. [2020-10-27 01:58:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:58:56,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 766 [2020-10-27 01:58:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:56,238 INFO L225 Difference]: With dead ends: 2827 [2020-10-27 01:58:56,238 INFO L226 Difference]: Without dead ends: 1908 [2020-10-27 01:58:56,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:58:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-10-27 01:58:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1055. [2020-10-27 01:58:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-10-27 01:58:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1319 transitions. [2020-10-27 01:58:56,511 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1319 transitions. Word has length 766 [2020-10-27 01:58:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:56,511 INFO L481 AbstractCegarLoop]: Abstraction has 1055 states and 1319 transitions. [2020-10-27 01:58:56,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:58:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1319 transitions. [2020-10-27 01:58:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2020-10-27 01:58:56,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:56,516 INFO L422 BasicCegarLoop]: trace histogram [252, 252, 252, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:56,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:58:56,517 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:56,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1669682345, now seen corresponding path program 21 times [2020-10-27 01:58:56,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:56,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579863918] [2020-10-27 01:58:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:57,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:58,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:58,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:59,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:59,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 810 [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:59:02,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:02,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:02,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 98112 backedges. 15038 proven. 651 refuted. 0 times theorem prover too weak. 82423 trivial. 0 not checked. [2020-10-27 01:59:03,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579863918] [2020-10-27 01:59:03,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:03,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:59:03,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283620904] [2020-10-27 01:59:03,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:59:03,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:59:03,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:59:03,143 INFO L87 Difference]: Start difference. First operand 1055 states and 1319 transitions. Second operand 25 states. [2020-10-27 01:59:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:07,128 INFO L93 Difference]: Finished difference Result 2955 states and 3798 transitions. [2020-10-27 01:59:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:59:07,129 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 802 [2020-10-27 01:59:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:07,137 INFO L225 Difference]: With dead ends: 2955 [2020-10-27 01:59:07,137 INFO L226 Difference]: Without dead ends: 1992 [2020-10-27 01:59:07,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:59:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-10-27 01:59:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1103. [2020-10-27 01:59:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-10-27 01:59:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1379 transitions. [2020-10-27 01:59:07,483 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1379 transitions. Word has length 802 [2020-10-27 01:59:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:07,483 INFO L481 AbstractCegarLoop]: Abstraction has 1103 states and 1379 transitions. [2020-10-27 01:59:07,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:59:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1379 transitions. [2020-10-27 01:59:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2020-10-27 01:59:07,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:07,489 INFO L422 BasicCegarLoop]: trace histogram [264, 264, 264, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:07,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:59:07,490 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:07,490 INFO L82 PathProgramCache]: Analyzing trace with hash -974388871, now seen corresponding path program 22 times [2020-10-27 01:59:07,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:07,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136681168] [2020-10-27 01:59:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:08,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:09,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:10,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:12,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 846 [2020-10-27 01:59:12,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 01:59:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 01:59:12,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:59:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:59:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:13,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:13,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:13,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:13,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:13,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:13,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:13,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:13,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:13,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:13,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 107526 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 106976 trivial. 0 not checked. [2020-10-27 01:59:13,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136681168] [2020-10-27 01:59:13,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:59:13,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:59:13,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326551317] [2020-10-27 01:59:13,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:59:13,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:13,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:59:13,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:59:13,421 INFO L87 Difference]: Start difference. First operand 1103 states and 1379 transitions. Second operand 4 states. [2020-10-27 01:59:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:13,969 INFO L93 Difference]: Finished difference Result 2724 states and 3539 transitions. [2020-10-27 01:59:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:59:13,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 838 [2020-10-27 01:59:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:13,977 INFO L225 Difference]: With dead ends: 2724 [2020-10-27 01:59:13,977 INFO L226 Difference]: Without dead ends: 1631 [2020-10-27 01:59:13,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:59:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2020-10-27 01:59:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1367. [2020-10-27 01:59:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1367 states. [2020-10-27 01:59:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1643 transitions. [2020-10-27 01:59:14,406 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1643 transitions. Word has length 838 [2020-10-27 01:59:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:14,406 INFO L481 AbstractCegarLoop]: Abstraction has 1367 states and 1643 transitions. [2020-10-27 01:59:14,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:59:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1643 transitions. [2020-10-27 01:59:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1367 [2020-10-27 01:59:14,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:14,419 INFO L422 BasicCegarLoop]: trace histogram [264, 264, 264, 264, 264, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:14,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:59:14,419 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:14,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1630401401, now seen corresponding path program 1 times [2020-10-27 01:59:14,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:14,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85023664] [2020-10-27 01:59:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat