/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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:14:37,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:14:37,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:14:37,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:14:37,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:14:37,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:14:37,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:14:37,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:14:37,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:14:37,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:14:37,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:14:37,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:14:37,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:14:37,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:14:37,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:14:37,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:14:37,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:14:37,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:14:37,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:14:37,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:14:37,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:14:37,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:14:37,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:14:37,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:14:37,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:14:37,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:14:37,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:14:37,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:14:37,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:14:37,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:14:37,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:14:37,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:14:37,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:14:37,174 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 00:14:37,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:14:37,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:14:37,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:14:37,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:14:37,238 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:14:37,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:14:37,238 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:14:37,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:14:37,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:14:37,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:14:37,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:14:37,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:14:37,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:14:37,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:14:37,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:14:37,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:14:37,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:14:37,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:14:37,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:14:37,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:14:37,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:14:37,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:14:37,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:14:37,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:14:37,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:14:37,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:14:37,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:14:37,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:14:37,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:14:37,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:14:37,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:14:37,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:14:37,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:14:37,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:14:37,728 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:14:37,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label37.c [2020-10-27 00:14:37,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/960ff5685/1952610e5e304def98d349fff4b34636/FLAGdadb37324 [2020-10-27 00:14:38,820 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:14:38,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label37.c [2020-10-27 00:14:38,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/960ff5685/1952610e5e304def98d349fff4b34636/FLAGdadb37324 [2020-10-27 00:14:39,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/960ff5685/1952610e5e304def98d349fff4b34636 [2020-10-27 00:14:39,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:14:39,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:14:39,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:14:39,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:14:39,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:14:39,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:14:39" (1/1) ... [2020-10-27 00:14:39,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a48f637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:39, skipping insertion in model container [2020-10-27 00:14:39,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:14:39" (1/1) ... [2020-10-27 00:14:39,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:14:39,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:14:40,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:14:40,806 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:14:41,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:14:41,347 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:14:41,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41 WrapperNode [2020-10-27 00:14:41,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:14:41,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:14:41,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:14:41,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:14:41,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (1/1) ... [2020-10-27 00:14:41,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (1/1) ... [2020-10-27 00:14:41,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (1/1) ... [2020-10-27 00:14:41,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (1/1) ... [2020-10-27 00:14:41,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (1/1) ... [2020-10-27 00:14:41,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (1/1) ... [2020-10-27 00:14:41,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (1/1) ... [2020-10-27 00:14:41,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:14:41,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:14:41,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:14:41,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:14:41,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (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 00:14:41,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:14:41,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:14:41,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:14:41,797 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:14:41,797 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:14:41,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:14:41,798 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:14:41,798 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:14:41,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:14:41,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:14:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:14:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:14:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:14:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:14:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:14:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:14:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:14:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:14:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:14:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:14:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:14:53,482 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:14:53,483 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:14:53,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:53 BoogieIcfgContainer [2020-10-27 00:14:53,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:14:53,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:14:53,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:14:53,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:14:53,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:14:39" (1/3) ... [2020-10-27 00:14:53,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f51b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:53, skipping insertion in model container [2020-10-27 00:14:53,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:41" (2/3) ... [2020-10-27 00:14:53,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f51b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:53, skipping insertion in model container [2020-10-27 00:14:53,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:53" (3/3) ... [2020-10-27 00:14:53,496 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label37.c [2020-10-27 00:14:53,509 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:14:53,516 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:14:53,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:14:53,567 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:14:53,567 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:14:53,568 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:14:53,568 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:14:53,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:14:53,568 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:14:53,568 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:14:53,568 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:14:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:14:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 00:14:53,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:53,612 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] [2020-10-27 00:14:53,613 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash 452507635, now seen corresponding path program 1 times [2020-10-27 00:14:53,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:53,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650275759] [2020-10-27 00:14:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:54,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:54,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 00:14:54,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:54,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-27 00:14:54,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:14:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 00:14:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:14:54,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:54,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:54,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:54,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:54,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:54,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:14:54,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:54,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:54,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:54,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:54,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:54,709 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 00:14:54,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650275759] [2020-10-27 00:14:54,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:14:54,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:14:54,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475907519] [2020-10-27 00:14:54,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:14:54,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:54,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:14:54,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:14:54,748 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:15:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:09,895 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:15:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:15:09,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 00:15:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:09,925 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:15:09,925 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:15:09,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:15:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:15:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:15:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:15:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:15:10,101 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 25 [2020-10-27 00:15:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:10,102 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:15:10,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:15:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:15:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 00:15:10,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:10,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:15:10,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:15:10,108 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash -937647150, now seen corresponding path program 1 times [2020-10-27 00:15:10,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:10,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596699330] [2020-10-27 00:15:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:10,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:10,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:11,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:11,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:11,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:15:11,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:15:11,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1460 [2020-10-27 00:15:11,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:15:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 00:15:11,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:15:11,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:11,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:11,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:11,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:11,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:15:11,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:11,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:11,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:11,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:11,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:11,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:11,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:12,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:12,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:15:12,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:15:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-27 00:15:12,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:15:12,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:15:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:15:12,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596699330] [2020-10-27 00:15:12,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:12,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:15:12,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031581962] [2020-10-27 00:15:12,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:15:12,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:12,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:15:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:15:12,221 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:15:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:34,030 INFO L93 Difference]: Finished difference Result 2966 states and 4582 transitions. [2020-10-27 00:15:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:15:34,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-27 00:15:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:34,050 INFO L225 Difference]: With dead ends: 2966 [2020-10-27 00:15:34,051 INFO L226 Difference]: Without dead ends: 1969 [2020-10-27 00:15:34,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:15:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2020-10-27 00:15:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1930. [2020-10-27 00:15:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-27 00:15:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2595 transitions. [2020-10-27 00:15:34,155 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2595 transitions. Word has length 96 [2020-10-27 00:15:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:34,156 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2595 transitions. [2020-10-27 00:15:34,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:15:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2595 transitions. [2020-10-27 00:15:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 00:15:34,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:34,168 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:15:34,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:15:34,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:34,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1150236473, now seen corresponding path program 1 times [2020-10-27 00:15:34,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:34,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265445705] [2020-10-27 00:15:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:34,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:34,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:34,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 00:15:34,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:34,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-27 00:15:34,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:15:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 00:15:34,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:34,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:34,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:34,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:34,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:34,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:15:34,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:15:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:15:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:34,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:35,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:35,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:15:35,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:35,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 00:15:35,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:15:35,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:15:35,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265445705] [2020-10-27 00:15:35,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:35,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:15:35,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84829304] [2020-10-27 00:15:35,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:15:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:35,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:15:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:15:35,131 INFO L87 Difference]: Start difference. First operand 1930 states and 2595 transitions. Second operand 5 states. [2020-10-27 00:15:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:49,293 INFO L93 Difference]: Finished difference Result 4765 states and 6603 transitions. [2020-10-27 00:15:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:15:49,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-27 00:15:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:49,315 INFO L225 Difference]: With dead ends: 4765 [2020-10-27 00:15:49,315 INFO L226 Difference]: Without dead ends: 2841 [2020-10-27 00:15:49,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:15:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2020-10-27 00:15:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2832. [2020-10-27 00:15:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2020-10-27 00:15:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3707 transitions. [2020-10-27 00:15:49,423 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3707 transitions. Word has length 99 [2020-10-27 00:15:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:49,424 INFO L481 AbstractCegarLoop]: Abstraction has 2832 states and 3707 transitions. [2020-10-27 00:15:49,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:15:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3707 transitions. [2020-10-27 00:15:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 00:15:49,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:49,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:15:49,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:15:49,430 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1880946850, now seen corresponding path program 1 times [2020-10-27 00:15:49,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:49,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953198738] [2020-10-27 00:15:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:49,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:49,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:54,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:54,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 00:15:54,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:15:54,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 00:15:54,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:54,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:15:54,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:54,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 00:15:54,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:54,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:54,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:54,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:54,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:54,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:54,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:15:54,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:54,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:54,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:54,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:54,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:54,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:54,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:54,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:15:54,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:15:54,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-27 00:15:54,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:15:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:55,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 00:15:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:55,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:55,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:55,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:15:55,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 00:15:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:15:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 35 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 00:15:55,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953198738] [2020-10-27 00:15:55,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:55,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:15:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634156252] [2020-10-27 00:15:55,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:15:55,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:55,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:15:55,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:15:55,392 INFO L87 Difference]: Start difference. First operand 2832 states and 3707 transitions. Second operand 8 states. [2020-10-27 00:16:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:13,907 INFO L93 Difference]: Finished difference Result 8472 states and 11274 transitions. [2020-10-27 00:16:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:16:13,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 172 [2020-10-27 00:16:13,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:13,935 INFO L225 Difference]: With dead ends: 8472 [2020-10-27 00:16:13,936 INFO L226 Difference]: Without dead ends: 4745 [2020-10-27 00:16:13,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:16:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2020-10-27 00:16:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 3787. [2020-10-27 00:16:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3787 states. [2020-10-27 00:16:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 4547 transitions. [2020-10-27 00:16:14,093 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 4547 transitions. Word has length 172 [2020-10-27 00:16:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:14,094 INFO L481 AbstractCegarLoop]: Abstraction has 3787 states and 4547 transitions. [2020-10-27 00:16:14,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:16:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 4547 transitions. [2020-10-27 00:16:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 00:16:14,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:14,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 00:16:14,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:16:14,098 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash 802535767, now seen corresponding path program 1 times [2020-10-27 00:16:14,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:14,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946799738] [2020-10-27 00:16:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:14,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:15,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:15,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-27 00:16:15,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:15,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-27 00:16:15,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:16:15,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:15,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:15,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:15,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:15,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:15,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:15,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:16:15,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:15,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:15,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:15,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:15,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:15,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:15,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:15,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 00:16:15,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:15,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:16:15,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:16:16,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:16,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 00:16:16,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:16,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:16:16,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:16:16,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946799738] [2020-10-27 00:16:16,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:16,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:16:16,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433901466] [2020-10-27 00:16:16,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:16:16,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:16:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:16:16,273 INFO L87 Difference]: Start difference. First operand 3787 states and 4547 transitions. Second operand 7 states. [2020-10-27 00:16:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:33,493 INFO L93 Difference]: Finished difference Result 9831 states and 12206 transitions. [2020-10-27 00:16:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:16:33,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 185 [2020-10-27 00:16:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:33,530 INFO L225 Difference]: With dead ends: 9831 [2020-10-27 00:16:33,531 INFO L226 Difference]: Without dead ends: 6050 [2020-10-27 00:16:33,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:16:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6050 states. [2020-10-27 00:16:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6050 to 6034. [2020-10-27 00:16:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6034 states. [2020-10-27 00:16:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 7245 transitions. [2020-10-27 00:16:33,755 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 7245 transitions. Word has length 185 [2020-10-27 00:16:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:33,758 INFO L481 AbstractCegarLoop]: Abstraction has 6034 states and 7245 transitions. [2020-10-27 00:16:33,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:16:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 7245 transitions. [2020-10-27 00:16:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 00:16:33,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:33,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 00:16:33,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:16:33,763 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash -472398789, now seen corresponding path program 1 times [2020-10-27 00:16:33,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:33,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826165117] [2020-10-27 00:16:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:33,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:33,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:37,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:38,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:38,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 00:16:38,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:16:38,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 00:16:38,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:38,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:16:38,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:16:38,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-27 00:16:38,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:39,088 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:16:39,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:39,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:39,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:39,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:39,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:39,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 00:16:39,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:16:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:39,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:39,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:39,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:39,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:39,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:39,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 00:16:39,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:16:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:16:39,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:39,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:39,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:39,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:16:39,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:39,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 00:16:39,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:39,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:39,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:39,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:16:39,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:16:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 68 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:16:40,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826165117] [2020-10-27 00:16:40,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:40,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:16:40,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23893065] [2020-10-27 00:16:40,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:16:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:16:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:16:40,215 INFO L87 Difference]: Start difference. First operand 6034 states and 7245 transitions. Second operand 9 states. [2020-10-27 00:16:40,391 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:16:44,353 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:16:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:59,512 INFO L93 Difference]: Finished difference Result 15756 states and 19368 transitions. [2020-10-27 00:16:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:16:59,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 187 [2020-10-27 00:16:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:59,556 INFO L225 Difference]: With dead ends: 15756 [2020-10-27 00:16:59,557 INFO L226 Difference]: Without dead ends: 9283 [2020-10-27 00:16:59,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:16:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2020-10-27 00:16:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 9239. [2020-10-27 00:16:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9239 states. [2020-10-27 00:16:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9239 states to 9239 states and 10855 transitions. [2020-10-27 00:16:59,809 INFO L78 Accepts]: Start accepts. Automaton has 9239 states and 10855 transitions. Word has length 187 [2020-10-27 00:16:59,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:59,809 INFO L481 AbstractCegarLoop]: Abstraction has 9239 states and 10855 transitions. [2020-10-27 00:16:59,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:16:59,809 INFO L276 IsEmpty]: Start isEmpty. Operand 9239 states and 10855 transitions. [2020-10-27 00:16:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-27 00:16:59,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:59,813 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:59,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:16:59,813 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:59,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1958398331, now seen corresponding path program 1 times [2020-10-27 00:16:59,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:59,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329452299] [2020-10-27 00:16:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:04,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:04,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-27 00:17:04,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:17:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 00:17:04,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:17:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 00:17:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:05,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:05,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:05,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:05,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:05,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:17:05,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:05,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:05,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:05,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:05,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 00:17:05,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:05,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:05,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:05,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:05,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:17:05,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:17:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-27 00:17:05,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:17:05,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 111 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:17:05,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329452299] [2020-10-27 00:17:05,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:05,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:17:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679077910] [2020-10-27 00:17:05,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:17:05,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:05,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:17:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:17:05,721 INFO L87 Difference]: Start difference. First operand 9239 states and 10855 transitions. Second operand 6 states. [2020-10-27 00:17:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:17,693 INFO L93 Difference]: Finished difference Result 18487 states and 22116 transitions. [2020-10-27 00:17:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:17:17,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 198 [2020-10-27 00:17:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:17,748 INFO L225 Difference]: With dead ends: 18487 [2020-10-27 00:17:17,748 INFO L226 Difference]: Without dead ends: 9689 [2020-10-27 00:17:17,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9689 states. [2020-10-27 00:17:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9689 to 9672. [2020-10-27 00:17:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9672 states. [2020-10-27 00:17:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 11474 transitions. [2020-10-27 00:17:18,031 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 11474 transitions. Word has length 198 [2020-10-27 00:17:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:18,032 INFO L481 AbstractCegarLoop]: Abstraction has 9672 states and 11474 transitions. [2020-10-27 00:17:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:17:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 11474 transitions. [2020-10-27 00:17:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-27 00:17:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:18,038 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:17:18,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:17:18,039 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:18,039 INFO L82 PathProgramCache]: Analyzing trace with hash 502369536, now seen corresponding path program 1 times [2020-10-27 00:17:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:18,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581051986] [2020-10-27 00:17:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:18,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:20,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:22,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:22,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-27 00:17:22,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:17:22,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4009 [2020-10-27 00:17:22,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:22,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:17:22,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:17:22,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 276 [2020-10-27 00:17:22,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:22,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:22,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:22,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:22,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:22,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:17:22,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:17:22,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:22,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:22,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:22,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:22,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:22,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:22,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 00:17:22,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:22,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:17:22,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:22,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:17:22,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:22,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:22,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:22,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:17:22,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:22,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 00:17:22,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:22,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:22,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:17:22,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:22,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:17:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:23,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:23,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:17:23,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:23,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 00:17:23,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:23,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:17:23,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 143 proven. 55 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 00:17:23,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581051986] [2020-10-27 00:17:23,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:23,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:17:23,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250877790] [2020-10-27 00:17:23,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:17:23,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:23,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:17:23,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:17:23,347 INFO L87 Difference]: Start difference. First operand 9672 states and 11474 transitions. Second operand 9 states. [2020-10-27 00:17:23,524 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:17:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:43,455 INFO L93 Difference]: Finished difference Result 22623 states and 28660 transitions. [2020-10-27 00:17:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:17:43,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 269 [2020-10-27 00:17:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:43,517 INFO L225 Difference]: With dead ends: 22623 [2020-10-27 00:17:43,517 INFO L226 Difference]: Without dead ends: 12948 [2020-10-27 00:17:43,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:17:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2020-10-27 00:17:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 12788. [2020-10-27 00:17:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12788 states. [2020-10-27 00:17:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12788 states to 12788 states and 14959 transitions. [2020-10-27 00:17:43,900 INFO L78 Accepts]: Start accepts. Automaton has 12788 states and 14959 transitions. Word has length 269 [2020-10-27 00:17:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:43,901 INFO L481 AbstractCegarLoop]: Abstraction has 12788 states and 14959 transitions. [2020-10-27 00:17:43,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:17:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12788 states and 14959 transitions. [2020-10-27 00:17:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-27 00:17:43,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:43,907 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:17:43,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:17:43,908 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash -472317313, now seen corresponding path program 1 times [2020-10-27 00:17:43,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:43,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604619073] [2020-10-27 00:17:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:44,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:49,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:49,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 00:17:49,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:17:49,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 00:17:49,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:49,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:49,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:17:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:49,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:49,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:49,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:49,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:49,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:17:49,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:49,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:49,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:49,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:49,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:49,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:49,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:49,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:49,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:49,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:49,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 00:17:49,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:49,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:49,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:49,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:49,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:49,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:17:49,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 00:17:49,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:17:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:49,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:17:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:49,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:49,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:49,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:17:49,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:49,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 00:17:49,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:17:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:49,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 139 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:17:50,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604619073] [2020-10-27 00:17:50,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:50,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:17:50,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578090325] [2020-10-27 00:17:50,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:17:50,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:17:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:50,133 INFO L87 Difference]: Start difference. First operand 12788 states and 14959 transitions. Second operand 7 states. [2020-10-27 00:17:56,712 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:18:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:10,693 INFO L93 Difference]: Finished difference Result 27070 states and 31757 transitions. [2020-10-27 00:18:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:18:10,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 292 [2020-10-27 00:18:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:10,758 INFO L225 Difference]: With dead ends: 27070 [2020-10-27 00:18:10,758 INFO L226 Difference]: Without dead ends: 14723 [2020-10-27 00:18:10,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:18:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14723 states. [2020-10-27 00:18:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14723 to 14648. [2020-10-27 00:18:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14648 states. [2020-10-27 00:18:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14648 states to 14648 states and 17091 transitions. [2020-10-27 00:18:11,252 INFO L78 Accepts]: Start accepts. Automaton has 14648 states and 17091 transitions. Word has length 292 [2020-10-27 00:18:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:11,253 INFO L481 AbstractCegarLoop]: Abstraction has 14648 states and 17091 transitions. [2020-10-27 00:18:11,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 14648 states and 17091 transitions. [2020-10-27 00:18:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-27 00:18:11,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:11,262 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:18:11,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:18:11,263 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1808861919, now seen corresponding path program 1 times [2020-10-27 00:18:11,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:11,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9552990] [2020-10-27 00:18:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:11,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:14,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:16,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:16,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-27 00:18:16,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:18:16,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 00:18:16,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:18:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-27 00:18:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:16,644 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:18:16,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:16,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:16,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:16,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:16,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:18:16,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:16,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:16,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:16,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:18:16,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:16,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 00:18:16,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:16,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:18:16,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:16,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:18:16,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:17,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:18:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:17,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:17,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:17,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 00:18:17,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 00:18:17,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 00:18:17,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:17,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-27 00:18:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:17,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:17,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:17,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:18:17,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:17,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 00:18:17,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:17,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:18:17,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:18:17,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:18:17,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 59 proven. 222 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:18:18,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9552990] [2020-10-27 00:18:18,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:18,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:18:18,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713682209] [2020-10-27 00:18:18,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:18:18,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:18,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:18:18,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:18:18,016 INFO L87 Difference]: Start difference. First operand 14648 states and 17091 transitions. Second operand 10 states. [2020-10-27 00:18:18,214 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:18:19,424 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71