/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:10:20,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:10:20,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:10:20,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:10:20,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:10:20,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:10:20,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:10:20,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:10:20,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:10:20,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:10:20,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:10:20,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:10:20,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:10:20,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:10:20,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:10:20,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:10:20,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:10:20,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:10:20,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:10:20,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:10:20,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:10:20,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:10:20,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:10:20,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:10:20,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:10:20,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:10:20,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:10:20,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:10:20,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:10:20,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:10:20,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:10:20,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:10:20,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:10:20,213 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 00:10:20,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:10:20,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:10:20,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:10:20,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:10:20,246 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:10:20,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:10:20,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:10:20,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:10:20,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:10:20,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:10:20,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:10:20,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:10:20,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:10:20,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:10:20,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:10:20,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:10:20,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:10:20,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:10:20,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:10:20,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:10:20,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:10:20,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:10:20,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:10:20,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:10:20,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:10:20,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:10:20,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:10:20,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:10:20,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:10:20,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:10:20,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:10:20,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:10:20,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:10:20,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:10:20,629 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:10:20,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label22.c [2020-10-27 00:10:20,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d7373582/a60a5ab522e74c14beca0f5ae5b51b23/FLAG509b9945d [2020-10-27 00:10:21,591 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:10:21,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label22.c [2020-10-27 00:10:21,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d7373582/a60a5ab522e74c14beca0f5ae5b51b23/FLAG509b9945d [2020-10-27 00:10:21,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d7373582/a60a5ab522e74c14beca0f5ae5b51b23 [2020-10-27 00:10:21,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:10:21,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:10:21,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:10:21,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:10:21,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:10:21,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:10:21" (1/1) ... [2020-10-27 00:10:21,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6d5d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:21, skipping insertion in model container [2020-10-27 00:10:21,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:10:21" (1/1) ... [2020-10-27 00:10:21,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:10:21,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:10:22,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:10:22,847 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:10:23,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:10:23,334 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:10:23,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23 WrapperNode [2020-10-27 00:10:23,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:10:23,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:10:23,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:10:23,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:10:23,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (1/1) ... [2020-10-27 00:10:23,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (1/1) ... [2020-10-27 00:10:23,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (1/1) ... [2020-10-27 00:10:23,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (1/1) ... [2020-10-27 00:10:23,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (1/1) ... [2020-10-27 00:10:23,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (1/1) ... [2020-10-27 00:10:23,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (1/1) ... [2020-10-27 00:10:23,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:10:23,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:10:23,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:10:23,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:10:23,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (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 00:10:23,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:10:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:10:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:10:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:10:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:10:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:10:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:10:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:10:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:10:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:10:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:10:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:10:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:10:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:10:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:10:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:10:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:10:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:10:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:10:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:10:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:10:32,744 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:10:32,744 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:10:32,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:10:32 BoogieIcfgContainer [2020-10-27 00:10:32,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:10:32,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:10:32,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:10:32,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:10:32,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:10:21" (1/3) ... [2020-10-27 00:10:32,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da45d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:10:32, skipping insertion in model container [2020-10-27 00:10:32,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:23" (2/3) ... [2020-10-27 00:10:32,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da45d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:10:32, skipping insertion in model container [2020-10-27 00:10:32,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:10:32" (3/3) ... [2020-10-27 00:10:32,762 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label22.c [2020-10-27 00:10:32,778 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:10:32,785 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:10:32,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:10:32,845 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:10:32,846 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:10:32,846 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:10:32,846 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:10:32,846 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:10:32,846 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:10:32,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:10:32,847 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:10:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:10:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 00:10:32,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:32,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:10:32,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1837215466, now seen corresponding path program 1 times [2020-10-27 00:10:32,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:32,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772019988] [2020-10-27 00:10:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:33,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:33,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:33,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 00:10:33,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-27 00:10:33,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:33,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:10:33,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:33,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 00:10:33,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:10:33,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:33,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:33,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:33,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:33,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:33,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 00:10:33,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:33,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:33,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:34,028 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 00:10:34,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772019988] [2020-10-27 00:10:34,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:10:34,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:10:34,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866433201] [2020-10-27 00:10:34,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:10:34,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:10:34,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:10:34,062 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:10:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:47,780 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:10:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:10:47,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-27 00:10:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:47,808 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:10:47,809 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:10:47,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 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 00:10:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:10:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:10:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:10:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:10:47,950 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 58 [2020-10-27 00:10:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:47,951 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:10:47,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:10:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:10:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 00:10:47,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:47,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:10:47,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:10:47,959 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1532341718, now seen corresponding path program 1 times [2020-10-27 00:10:47,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:47,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742881160] [2020-10-27 00:10:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:48,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:48,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:49,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:49,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 00:10:49,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:10:49,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1557 [2020-10-27 00:10:49,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:10:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:10:49,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:10:49,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:49,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:49,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:49,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:49,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:49,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 00:10:49,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:49,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:49,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:10:49,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:10:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:49,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:50,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:50,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:10:50,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:50,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 00:10:50,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:50,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:50,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:50,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:10:50,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:10:50,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742881160] [2020-10-27 00:10:50,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:10:50,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:10:50,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7556573] [2020-10-27 00:10:50,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:10:50,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:50,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:10:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:10:50,176 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:11:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:07,259 INFO L93 Difference]: Finished difference Result 2457 states and 3911 transitions. [2020-10-27 00:11:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:11:07,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 129 [2020-10-27 00:11:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:07,270 INFO L225 Difference]: With dead ends: 2457 [2020-10-27 00:11:07,270 INFO L226 Difference]: Without dead ends: 1471 [2020-10-27 00:11:07,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:11:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2020-10-27 00:11:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1457. [2020-10-27 00:11:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1457 states. [2020-10-27 00:11:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1981 transitions. [2020-10-27 00:11:07,327 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1981 transitions. Word has length 129 [2020-10-27 00:11:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:07,328 INFO L481 AbstractCegarLoop]: Abstraction has 1457 states and 1981 transitions. [2020-10-27 00:11:07,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:11:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1981 transitions. [2020-10-27 00:11:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 00:11:07,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:07,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:07,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:11:07,331 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:07,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash -223611657, now seen corresponding path program 1 times [2020-10-27 00:11:07,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:07,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150310572] [2020-10-27 00:11:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:07,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:07,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:08,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:08,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 00:11:08,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:08,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-10-27 00:11:08,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:11:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:11:08,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:08,797 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:11:08,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:08,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:08,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:08,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:08,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 00:11:08,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:08,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:08,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:09,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:09,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:11:09,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:09,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 00:11:09,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:11:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:11:09,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:11:09,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150310572] [2020-10-27 00:11:09,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:09,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:11:09,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743258281] [2020-10-27 00:11:09,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:11:09,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:09,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:11:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:11:09,316 INFO L87 Difference]: Start difference. First operand 1457 states and 1981 transitions. Second operand 8 states. [2020-10-27 00:11:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:28,728 INFO L93 Difference]: Finished difference Result 3033 states and 4481 transitions. [2020-10-27 00:11:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:11:28,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2020-10-27 00:11:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:28,741 INFO L225 Difference]: With dead ends: 3033 [2020-10-27 00:11:28,741 INFO L226 Difference]: Without dead ends: 1972 [2020-10-27 00:11:28,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:11:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2020-10-27 00:11:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1934. [2020-10-27 00:11:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1934 states. [2020-10-27 00:11:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2738 transitions. [2020-10-27 00:11:28,807 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2738 transitions. Word has length 132 [2020-10-27 00:11:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:28,808 INFO L481 AbstractCegarLoop]: Abstraction has 1934 states and 2738 transitions. [2020-10-27 00:11:28,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:11:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2738 transitions. [2020-10-27 00:11:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 00:11:28,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:28,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:28,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:11:28,811 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1189127913, now seen corresponding path program 1 times [2020-10-27 00:11:28,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:28,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271308779] [2020-10-27 00:11:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:28,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:28,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:31,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:31,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 00:11:31,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:31,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2299 [2020-10-27 00:11:31,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:31,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:11:31,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:31,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 00:11:31,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:31,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:31,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:31,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:31,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:11:31,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:31,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:31,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:31,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:31,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:31,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:31,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:31,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:11:31,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:31,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-27 00:11:31,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:11:31,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:11:31,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271308779] [2020-10-27 00:11:31,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:11:31,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:11:31,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956504648] [2020-10-27 00:11:31,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:11:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:11:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:11:31,911 INFO L87 Difference]: Start difference. First operand 1934 states and 2738 transitions. Second operand 7 states. [2020-10-27 00:11:46,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:46,028 INFO L93 Difference]: Finished difference Result 3569 states and 5271 transitions. [2020-10-27 00:11:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:11:46,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 167 [2020-10-27 00:11:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:46,044 INFO L225 Difference]: With dead ends: 3569 [2020-10-27 00:11:46,044 INFO L226 Difference]: Without dead ends: 2074 [2020-10-27 00:11:46,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:11:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-10-27 00:11:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1951. [2020-10-27 00:11:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1951 states. [2020-10-27 00:11:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2750 transitions. [2020-10-27 00:11:46,141 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2750 transitions. Word has length 167 [2020-10-27 00:11:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:46,142 INFO L481 AbstractCegarLoop]: Abstraction has 1951 states and 2750 transitions. [2020-10-27 00:11:46,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:11:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2750 transitions. [2020-10-27 00:11:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 00:11:46,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:46,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:46,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:11:46,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:46,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1724187467, now seen corresponding path program 1 times [2020-10-27 00:11:46,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:46,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626229465] [2020-10-27 00:11:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:47,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:47,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 00:11:47,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:47,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1307 [2020-10-27 00:11:47,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:47,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:11:47,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:47,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 00:11:47,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:47,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:47,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:47,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:47,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:47,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:11:47,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:47,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:47,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:47,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:47,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:47,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:47,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:47,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 00:11:47,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:47,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 00:11:47,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 00:11:47,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:11:48,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626229465] [2020-10-27 00:11:48,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:11:48,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:11:48,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570237953] [2020-10-27 00:11:48,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:11:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:11:48,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:11:48,062 INFO L87 Difference]: Start difference. First operand 1951 states and 2750 transitions. Second operand 7 states. [2020-10-27 00:12:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:01,748 INFO L93 Difference]: Finished difference Result 4889 states and 7291 transitions. [2020-10-27 00:12:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:12:01,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-10-27 00:12:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:01,771 INFO L225 Difference]: With dead ends: 4889 [2020-10-27 00:12:01,771 INFO L226 Difference]: Without dead ends: 3377 [2020-10-27 00:12:01,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:12:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2020-10-27 00:12:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3294. [2020-10-27 00:12:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3294 states. [2020-10-27 00:12:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 4132 transitions. [2020-10-27 00:12:01,864 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 4132 transitions. Word has length 173 [2020-10-27 00:12:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:01,865 INFO L481 AbstractCegarLoop]: Abstraction has 3294 states and 4132 transitions. [2020-10-27 00:12:01,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:12:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 4132 transitions. [2020-10-27 00:12:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 00:12:01,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:01,869 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:12:01,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:12:01,869 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash -806950930, now seen corresponding path program 1 times [2020-10-27 00:12:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:01,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066655945] [2020-10-27 00:12:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:01,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:03,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:03,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:03,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 00:12:03,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:12:03,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1174 [2020-10-27 00:12:03,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:03,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:12:03,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:12:03,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 00:12:03,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:03,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:03,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:03,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:03,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:03,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:03,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:12:03,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:12:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:03,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:12:03,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:03,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:03,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:03,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:03,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:03,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:03,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 00:12:03,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:12:03,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:03,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:03,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:03,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:03,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:12:03,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:03,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 00:12:03,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:03,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:03,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:03,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:12:03,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:12:03,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066655945] [2020-10-27 00:12:03,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:03,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:12:03,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56379863] [2020-10-27 00:12:03,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:12:03,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:12:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:12:03,763 INFO L87 Difference]: Start difference. First operand 3294 states and 4132 transitions. Second operand 6 states. [2020-10-27 00:12:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:21,468 INFO L93 Difference]: Finished difference Result 8983 states and 11615 transitions. [2020-10-27 00:12:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:12:21,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 214 [2020-10-27 00:12:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:21,496 INFO L225 Difference]: With dead ends: 8983 [2020-10-27 00:12:21,497 INFO L226 Difference]: Without dead ends: 6128 [2020-10-27 00:12:21,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:12:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2020-10-27 00:12:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 5224. [2020-10-27 00:12:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5224 states. [2020-10-27 00:12:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5224 states to 5224 states and 6472 transitions. [2020-10-27 00:12:21,636 INFO L78 Accepts]: Start accepts. Automaton has 5224 states and 6472 transitions. Word has length 214 [2020-10-27 00:12:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:21,637 INFO L481 AbstractCegarLoop]: Abstraction has 5224 states and 6472 transitions. [2020-10-27 00:12:21,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:12:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5224 states and 6472 transitions. [2020-10-27 00:12:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 00:12:21,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:21,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:12:21,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:12:21,642 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash 929987778, now seen corresponding path program 1 times [2020-10-27 00:12:21,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:21,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906712777] [2020-10-27 00:12:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:21,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:22,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:23,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:26,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:26,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-27 00:12:26,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:12:26,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 00:12:26,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:26,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:12:26,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:12:26,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:12:26,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:26,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:26,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:26,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:26,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:26,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 00:12:26,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:12:26,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:26,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:26,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:27,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:27,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:27,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:27,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-27 00:12:27,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:12:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:12:27,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:12:27,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:27,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:27,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:27,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:12:27,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 00:12:27,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:12:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 101 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:12:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906712777] [2020-10-27 00:12:27,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:27,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:12:27,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347705678] [2020-10-27 00:12:27,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:12:27,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:27,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:12:27,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:12:27,833 INFO L87 Difference]: Start difference. First operand 5224 states and 6472 transitions. Second operand 10 states. [2020-10-27 00:12:28,050 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 00:12:33,032 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:12:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:49,367 INFO L93 Difference]: Finished difference Result 11289 states and 14525 transitions. [2020-10-27 00:12:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 00:12:49,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 220 [2020-10-27 00:12:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:49,406 INFO L225 Difference]: With dead ends: 11289 [2020-10-27 00:12:49,406 INFO L226 Difference]: Without dead ends: 6504 [2020-10-27 00:12:49,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:12:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6504 states. [2020-10-27 00:12:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6504 to 5768. [2020-10-27 00:12:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5768 states. [2020-10-27 00:12:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7146 transitions. [2020-10-27 00:12:49,638 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7146 transitions. Word has length 220 [2020-10-27 00:12:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:49,639 INFO L481 AbstractCegarLoop]: Abstraction has 5768 states and 7146 transitions. [2020-10-27 00:12:49,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:12:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7146 transitions. [2020-10-27 00:12:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 00:12:49,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:49,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:12:49,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:12:49,643 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1116448120, now seen corresponding path program 1 times [2020-10-27 00:12:49,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:49,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227608768] [2020-10-27 00:12:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:49,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:49,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:50,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:54,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:54,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 00:12:54,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:12:54,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 00:12:54,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:12:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:12:54,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-27 00:12:54,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:54,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:54,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:54,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:54,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:54,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:54,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:12:54,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:54,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:12:54,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:54,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:12:54,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:54,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:54,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:55,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:55,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:55,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:55,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 00:12:55,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:55,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:55,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:55,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:12:55,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:55,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:55,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:55,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:55,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:55,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:12:55,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:12:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 00:12:55,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:12:55,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:12:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:12:55,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227608768] [2020-10-27 00:12:55,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:55,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:12:55,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042684992] [2020-10-27 00:12:55,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:12:55,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:55,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:12:55,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:12:55,684 INFO L87 Difference]: Start difference. First operand 5768 states and 7146 transitions. Second operand 7 states. [2020-10-27 00:13:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:13:25,768 INFO L93 Difference]: Finished difference Result 11553 states and 15188 transitions. [2020-10-27 00:13:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:13:25,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 231 [2020-10-27 00:13:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:13:25,799 INFO L225 Difference]: With dead ends: 11553 [2020-10-27 00:13:25,799 INFO L226 Difference]: Without dead ends: 6664 [2020-10-27 00:13:25,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:13:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6664 states. [2020-10-27 00:13:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6664 to 6634. [2020-10-27 00:13:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6634 states. [2020-10-27 00:13:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 8857 transitions. [2020-10-27 00:13:25,971 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 8857 transitions. Word has length 231 [2020-10-27 00:13:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:13:25,971 INFO L481 AbstractCegarLoop]: Abstraction has 6634 states and 8857 transitions. [2020-10-27 00:13:25,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:13:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 8857 transitions. [2020-10-27 00:13:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-27 00:13:25,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:13:25,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:13:25,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:13:25,980 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:13:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:13:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1510849446, now seen corresponding path program 1 times [2020-10-27 00:13:25,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:13:25,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611716749] [2020-10-27 00:13:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:13:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:26,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:26,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:26,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:31,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:31,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 00:13:31,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:13:31,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 00:13:31,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:31,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:31,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:13:31,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:13:31,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:13:31,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:31,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:31,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:31,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:31,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:31,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:13:31,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:13:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:13:31,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:31,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:31,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:31,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:31,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:31,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:31,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 00:13:31,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:13:31,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:31,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:13:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:31,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:31,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:31,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:13:31,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:31,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 00:13:31,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:13:31,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:31,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-10-27 00:13:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:31,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:31,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:31,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:13:31,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:31,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 00:13:31,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:31,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:13:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:13:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:13:31,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 224 proven. 72 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:13:31,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611716749] [2020-10-27 00:13:31,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:13:31,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:13:31,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919603834] [2020-10-27 00:13:31,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:13:31,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:13:31,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:13:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:13:31,835 INFO L87 Difference]: Start difference. First operand 6634 states and 8857 transitions. Second operand 7 states. [2020-10-27 00:13:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:13:53,248 INFO L93 Difference]: Finished difference Result 15292 states and 21389 transitions. [2020-10-27 00:13:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:13:53,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 293 [2020-10-27 00:13:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:13:53,281 INFO L225 Difference]: With dead ends: 15292 [2020-10-27 00:13:53,281 INFO L226 Difference]: Without dead ends: 9537 [2020-10-27 00:13:53,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:13:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9537 states. [2020-10-27 00:13:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 8552. [2020-10-27 00:13:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8552 states. [2020-10-27 00:13:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 11189 transitions. [2020-10-27 00:13:53,495 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 11189 transitions. Word has length 293 [2020-10-27 00:13:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:13:53,495 INFO L481 AbstractCegarLoop]: Abstraction has 8552 states and 11189 transitions. [2020-10-27 00:13:53,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:13:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 11189 transitions. [2020-10-27 00:13:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-27 00:13:53,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:13:53,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:13:53,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:13:53,503 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:13:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:13:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1698697252, now seen corresponding path program 1 times [2020-10-27 00:13:53,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:13:53,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305124979] [2020-10-27 00:13:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:13:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:53,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:53,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:55,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:57,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3623 [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 309 [2020-10-27 00:13:57,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:57,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:57,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:57,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:57,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:57,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:13:57,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:13:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:57,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:57,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:57,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:57,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:57,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:57,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 00:13:57,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:13:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:13:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:57,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:13:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:57,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:57,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:13:57,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 00:13:57,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:13:57,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:13:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:57,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:57,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:13:57,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:57,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 00:13:57,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:57,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:57,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:57,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:13:57,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:13:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 143 proven. 154 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 00:13:58,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305124979] [2020-10-27 00:13:58,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:13:58,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:13:58,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788449370] [2020-10-27 00:13:58,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:13:58,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:13:58,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:13:58,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:13:58,137 INFO L87 Difference]: Start difference. First operand 8552 states and 11189 transitions. Second operand 9 states.