/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=DEEPEST --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/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:10:09,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:10:09,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:10:09,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:10:09,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:10:09,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:10:09,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:10:09,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:10:09,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:10:09,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:10:09,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:10:09,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:10:09,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:10:09,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:10:09,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:10:09,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:10:09,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:10:09,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:10:09,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:10:09,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:10:09,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:10:09,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:10:09,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:10:09,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:10:09,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:10:09,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:10:09,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:10:09,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:10:09,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:10:09,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:10:09,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:10:09,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:10:09,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:10:09,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:10:09,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:10:09,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:10:09,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:10:09,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:10:09,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:10:09,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:10:09,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:10:09,158 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 20:10:09,207 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:10:09,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:10:09,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:10:09,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:10:09,212 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:10:09,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:10:09,214 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:10:09,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:10:09,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:10:09,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:10:09,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:10:09,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:10:09,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:10:09,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:10:09,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:10:09,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:10:09,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:10:09,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:10:09,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:10:09,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:10:09,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:10:09,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:10:09,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:10:09,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:10:09,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:10:09,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:10:09,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:10:09,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:10:09,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:10:09,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:10:09,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:10:09,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:10:09,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:10:09,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:10:09,653 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:10:09,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-10-27 20:10:09,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d40a4b6e/1019a2076d574f168f43340ba5afee28/FLAG68104d09d [2020-10-27 20:10:10,494 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:10:10,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-10-27 20:10:10,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d40a4b6e/1019a2076d574f168f43340ba5afee28/FLAG68104d09d [2020-10-27 20:10:10,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d40a4b6e/1019a2076d574f168f43340ba5afee28 [2020-10-27 20:10:10,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:10:10,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:10:10,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:10:10,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:10:10,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:10:10,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:10:10" (1/1) ... [2020-10-27 20:10:10,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167d1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:10, skipping insertion in model container [2020-10-27 20:10:10,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:10:10" (1/1) ... [2020-10-27 20:10:10,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:10:10,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:10:11,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:10:11,093 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:10:11,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:10:11,134 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:10:11,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11 WrapperNode [2020-10-27 20:10:11,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:10:11,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:10:11,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:10:11,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:10:11,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (1/1) ... [2020-10-27 20:10:11,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (1/1) ... [2020-10-27 20:10:11,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (1/1) ... [2020-10-27 20:10:11,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (1/1) ... [2020-10-27 20:10:11,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (1/1) ... [2020-10-27 20:10:11,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (1/1) ... [2020-10-27 20:10:11,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (1/1) ... [2020-10-27 20:10:11,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:10:11,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:10:11,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:10:11,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:10:11,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (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 20:10:11,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:10:11,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:10:11,255 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:10:11,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:10:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:10:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:10:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:10:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:10:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:10:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:10:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:10:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:10:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:10:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:10:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:10:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:10:11,717 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:10:11,717 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:10:11,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:10:11 BoogieIcfgContainer [2020-10-27 20:10:11,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:10:11,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:10:11,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:10:11,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:10:11,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:10:10" (1/3) ... [2020-10-27 20:10:11,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76226298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:10:11, skipping insertion in model container [2020-10-27 20:10:11,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:11" (2/3) ... [2020-10-27 20:10:11,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76226298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:10:11, skipping insertion in model container [2020-10-27 20:10:11,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:10:11" (3/3) ... [2020-10-27 20:10:11,735 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-10-27 20:10:11,748 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:10:11,754 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:10:11,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:10:11,803 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:10:11,804 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:10:11,804 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:10:11,804 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:10:11,804 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:10:11,804 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:10:11,804 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:10:11,805 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:10:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 20:10:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:10:11,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:11,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:11,832 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:11,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2118099465, now seen corresponding path program 1 times [2020-10-27 20:10:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:11,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047389209] [2020-10-27 20:10:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:12,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:12,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:12,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:10:12,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:12,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 20:10:12,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:12,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:10:12,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:12,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:10:12,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:12,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:12,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:12,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:12,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:12,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:10:12,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:10:12,387 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 20:10:12,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047389209] [2020-10-27 20:10:12,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:12,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504448753] [2020-10-27 20:10:12,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:12,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:12,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:12,415 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-27 20:10:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:12,642 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2020-10-27 20:10:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:12,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:10:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:12,657 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:10:12,657 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:10:12,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:10:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-27 20:10:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:10:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-10-27 20:10:12,714 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-10-27 20:10:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:12,714 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-10-27 20:10:12,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-10-27 20:10:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:10:12,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:12,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:12,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:10:12,717 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1783840821, now seen corresponding path program 1 times [2020-10-27 20:10:12,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:12,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427685888] [2020-10-27 20:10:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:12,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:12,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:12,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:10:12,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:12,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 20:10:12,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:12,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:12,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:10:12,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:12,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:10:12,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:12,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:12,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:12,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:12,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:10:12,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-27 20:10:13,011 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 20:10:13,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427685888] [2020-10-27 20:10:13,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:13,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:13,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397879379] [2020-10-27 20:10:13,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:13,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:13,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:13,021 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-10-27 20:10:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:13,185 INFO L93 Difference]: Finished difference Result 79 states and 135 transitions. [2020-10-27 20:10:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:13,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:10:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:13,187 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:10:13,188 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:10:13,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:10:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:10:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:10:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-10-27 20:10:13,204 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-10-27 20:10:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:13,204 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-10-27 20:10:13,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-10-27 20:10:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:10:13,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:13,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:13,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:10:13,207 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:13,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1229925405, now seen corresponding path program 1 times [2020-10-27 20:10:13,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:13,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834629337] [2020-10-27 20:10:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:10:13,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:13,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 20:10:13,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:13,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:10:13,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:10:13,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:13,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:13,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 20:10:13,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:13,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:13,496 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 20:10:13,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834629337] [2020-10-27 20:10:13,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:13,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:13,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226623737] [2020-10-27 20:10:13,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:13,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:13,501 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-10-27 20:10:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:13,724 INFO L93 Difference]: Finished difference Result 128 states and 220 transitions. [2020-10-27 20:10:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:13,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 20:10:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:13,728 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:10:13,729 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 20:10:13,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 20:10:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-27 20:10:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:10:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 142 transitions. [2020-10-27 20:10:13,760 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 142 transitions. Word has length 19 [2020-10-27 20:10:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:13,760 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 142 transitions. [2020-10-27 20:10:13,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 142 transitions. [2020-10-27 20:10:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:10:13,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:13,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:13,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:10:13,765 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:13,766 INFO L82 PathProgramCache]: Analyzing trace with hash -836898395, now seen corresponding path program 1 times [2020-10-27 20:10:13,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:13,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141324717] [2020-10-27 20:10:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:10:13,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:13,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 20:10:13,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:10:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:13,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:14,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:14,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:14,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:14,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:14,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:10:14,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:14,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:14,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:14,056 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 20:10:14,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141324717] [2020-10-27 20:10:14,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:14,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:14,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341558269] [2020-10-27 20:10:14,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:14,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:14,060 INFO L87 Difference]: Start difference. First operand 85 states and 142 transitions. Second operand 4 states. [2020-10-27 20:10:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:14,184 INFO L93 Difference]: Finished difference Result 109 states and 181 transitions. [2020-10-27 20:10:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:14,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 20:10:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:14,187 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:10:14,187 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 20:10:14,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 20:10:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2020-10-27 20:10:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:10:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 140 transitions. [2020-10-27 20:10:14,200 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 140 transitions. Word has length 19 [2020-10-27 20:10:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:14,201 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 140 transitions. [2020-10-27 20:10:14,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 140 transitions. [2020-10-27 20:10:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:10:14,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:14,202 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] [2020-10-27 20:10:14,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:10:14,203 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash 533677250, now seen corresponding path program 1 times [2020-10-27 20:10:14,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:14,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464356388] [2020-10-27 20:10:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:14,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:10:14,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:14,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 20:10:14,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:14,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:14,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:10:14,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:14,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:14,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:14,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:14,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:14,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:10:14,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:14,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:14,358 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 20:10:14,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464356388] [2020-10-27 20:10:14,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:14,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:14,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256448144] [2020-10-27 20:10:14,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:14,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:14,361 INFO L87 Difference]: Start difference. First operand 85 states and 140 transitions. Second operand 4 states. [2020-10-27 20:10:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:14,486 INFO L93 Difference]: Finished difference Result 153 states and 255 transitions. [2020-10-27 20:10:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:14,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 20:10:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:14,488 INFO L225 Difference]: With dead ends: 153 [2020-10-27 20:10:14,488 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 20:10:14,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 20:10:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2020-10-27 20:10:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:10:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 192 transitions. [2020-10-27 20:10:14,504 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 192 transitions. Word has length 20 [2020-10-27 20:10:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:14,504 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 192 transitions. [2020-10-27 20:10:14,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 192 transitions. [2020-10-27 20:10:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:10:14,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:14,506 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] [2020-10-27 20:10:14,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:10:14,506 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 140650240, now seen corresponding path program 1 times [2020-10-27 20:10:14,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:14,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205625741] [2020-10-27 20:10:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:14,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:14,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:10:14,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 20:10:14,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:10:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:14,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:14,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:14,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:14,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:14,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:14,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:10:14,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:14,658 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 20:10:14,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205625741] [2020-10-27 20:10:14,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:14,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:14,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800888348] [2020-10-27 20:10:14,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:14,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:14,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:14,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:14,663 INFO L87 Difference]: Start difference. First operand 117 states and 192 transitions. Second operand 4 states. [2020-10-27 20:10:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:14,822 INFO L93 Difference]: Finished difference Result 269 states and 447 transitions. [2020-10-27 20:10:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:14,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 20:10:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:14,825 INFO L225 Difference]: With dead ends: 269 [2020-10-27 20:10:14,825 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 20:10:14,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 20:10:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-27 20:10:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:10:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 252 transitions. [2020-10-27 20:10:14,841 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 252 transitions. Word has length 20 [2020-10-27 20:10:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:14,841 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 252 transitions. [2020-10-27 20:10:14,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 252 transitions. [2020-10-27 20:10:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:10:14,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:14,843 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] [2020-10-27 20:10:14,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:10:14,844 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash -629204722, now seen corresponding path program 1 times [2020-10-27 20:10:14,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:14,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707118139] [2020-10-27 20:10:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:14,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:15,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:10:15,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:10:15,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 20:10:15,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:15,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:15,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:10:15,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:15,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:15,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:15,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:15,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:15,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:10:15,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:15,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:15,057 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 20:10:15,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707118139] [2020-10-27 20:10:15,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:15,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:15,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116725661] [2020-10-27 20:10:15,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:15,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:15,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:15,060 INFO L87 Difference]: Start difference. First operand 157 states and 252 transitions. Second operand 4 states. [2020-10-27 20:10:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:15,176 INFO L93 Difference]: Finished difference Result 277 states and 447 transitions. [2020-10-27 20:10:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:15,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 20:10:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:15,179 INFO L225 Difference]: With dead ends: 277 [2020-10-27 20:10:15,179 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 20:10:15,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 20:10:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 225. [2020-10-27 20:10:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 20:10:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 356 transitions. [2020-10-27 20:10:15,195 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 356 transitions. Word has length 21 [2020-10-27 20:10:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:15,195 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 356 transitions. [2020-10-27 20:10:15,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 356 transitions. [2020-10-27 20:10:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:10:15,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:15,197 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] [2020-10-27 20:10:15,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:10:15,198 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1022231732, now seen corresponding path program 1 times [2020-10-27 20:10:15,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:15,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861093352] [2020-10-27 20:10:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:15,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:15,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:10:15,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:10:15,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 20:10:15,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:15,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:15,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:10:15,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:15,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:15,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:15,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:15,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:15,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:15,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:10:15,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:15,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:15,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:15,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:15,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:15,433 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 20:10:15,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861093352] [2020-10-27 20:10:15,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:15,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:15,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990777334] [2020-10-27 20:10:15,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:15,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:15,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:15,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:15,435 INFO L87 Difference]: Start difference. First operand 225 states and 356 transitions. Second operand 4 states. [2020-10-27 20:10:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:15,567 INFO L93 Difference]: Finished difference Result 517 states and 823 transitions. [2020-10-27 20:10:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:15,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 20:10:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:15,570 INFO L225 Difference]: With dead ends: 517 [2020-10-27 20:10:15,571 INFO L226 Difference]: Without dead ends: 298 [2020-10-27 20:10:15,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-27 20:10:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2020-10-27 20:10:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-27 20:10:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 456 transitions. [2020-10-27 20:10:15,590 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 456 transitions. Word has length 21 [2020-10-27 20:10:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:15,590 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 456 transitions. [2020-10-27 20:10:15,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 456 transitions. [2020-10-27 20:10:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:10:15,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:15,592 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] [2020-10-27 20:10:15,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:10:15,593 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1976170381, now seen corresponding path program 1 times [2020-10-27 20:10:15,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:15,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131629045] [2020-10-27 20:10:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:15,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:15,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:10:15,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:10:15,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-27 20:10:15,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:10:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:15,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:15,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:15,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:15,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:15,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:15,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 20:10:15,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:15,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:15,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:15,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:15,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:15,922 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 20:10:15,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131629045] [2020-10-27 20:10:15,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:15,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327068139] [2020-10-27 20:10:15,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:15,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:15,925 INFO L87 Difference]: Start difference. First operand 297 states and 456 transitions. Second operand 4 states. [2020-10-27 20:10:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:16,064 INFO L93 Difference]: Finished difference Result 509 states and 779 transitions. [2020-10-27 20:10:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:16,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:10:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:16,068 INFO L225 Difference]: With dead ends: 509 [2020-10-27 20:10:16,069 INFO L226 Difference]: Without dead ends: 506 [2020-10-27 20:10:16,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-10-27 20:10:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 441. [2020-10-27 20:10:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-27 20:10:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 664 transitions. [2020-10-27 20:10:16,093 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 664 transitions. Word has length 22 [2020-10-27 20:10:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:16,093 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 664 transitions. [2020-10-27 20:10:16,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 664 transitions. [2020-10-27 20:10:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:10:16,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:16,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:16,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:10:16,096 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1583143371, now seen corresponding path program 1 times [2020-10-27 20:10:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:16,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270748970] [2020-10-27 20:10:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:16,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:16,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:10:16,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:10:16,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-27 20:10:16,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:16,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:10:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:16,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:16,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:16,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:16,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:16,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:10:16,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:16,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:16,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:16,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:16,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:16,430 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 20:10:16,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270748970] [2020-10-27 20:10:16,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:16,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:16,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270551072] [2020-10-27 20:10:16,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:16,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:16,433 INFO L87 Difference]: Start difference. First operand 441 states and 664 transitions. Second operand 4 states. [2020-10-27 20:10:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:16,583 INFO L93 Difference]: Finished difference Result 1005 states and 1515 transitions. [2020-10-27 20:10:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:16,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:10:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:16,587 INFO L225 Difference]: With dead ends: 1005 [2020-10-27 20:10:16,587 INFO L226 Difference]: Without dead ends: 570 [2020-10-27 20:10:16,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-27 20:10:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 569. [2020-10-27 20:10:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-27 20:10:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 824 transitions. [2020-10-27 20:10:16,636 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 824 transitions. Word has length 22 [2020-10-27 20:10:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:16,636 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 824 transitions. [2020-10-27 20:10:16,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 824 transitions. [2020-10-27 20:10:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:10:16,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:16,638 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] [2020-10-27 20:10:16,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:10:16,638 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:16,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1138430521, now seen corresponding path program 1 times [2020-10-27 20:10:16,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:16,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313010182] [2020-10-27 20:10:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:16,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:17,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:10:17,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:10:17,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-27 20:10:17,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:10:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:17,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:17,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:17,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:17,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:17,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:17,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:10:17,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:17,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:17,144 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 20:10:17,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313010182] [2020-10-27 20:10:17,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:17,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421100002] [2020-10-27 20:10:17,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:17,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:17,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:17,147 INFO L87 Difference]: Start difference. First operand 569 states and 824 transitions. Second operand 4 states. [2020-10-27 20:10:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:17,307 INFO L93 Difference]: Finished difference Result 940 states and 1338 transitions. [2020-10-27 20:10:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:17,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:10:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:17,312 INFO L225 Difference]: With dead ends: 940 [2020-10-27 20:10:17,313 INFO L226 Difference]: Without dead ends: 937 [2020-10-27 20:10:17,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2020-10-27 20:10:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 873. [2020-10-27 20:10:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-10-27 20:10:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1240 transitions. [2020-10-27 20:10:17,352 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1240 transitions. Word has length 23 [2020-10-27 20:10:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:17,352 INFO L481 AbstractCegarLoop]: Abstraction has 873 states and 1240 transitions. [2020-10-27 20:10:17,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1240 transitions. [2020-10-27 20:10:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:10:17,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:17,354 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] [2020-10-27 20:10:17,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:10:17,355 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash 745403511, now seen corresponding path program 1 times [2020-10-27 20:10:17,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:17,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347872189] [2020-10-27 20:10:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:17,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:17,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:10:17,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:10:17,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 20:10:17,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:10:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:17,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:17,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:17,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:17,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:17,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:17,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:17,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:17,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:17,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:17,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:17,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:17,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:17,888 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 20:10:17,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347872189] [2020-10-27 20:10:17,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:17,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:17,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405616835] [2020-10-27 20:10:17,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:17,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:17,890 INFO L87 Difference]: Start difference. First operand 873 states and 1240 transitions. Second operand 4 states. [2020-10-27 20:10:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:18,031 INFO L93 Difference]: Finished difference Result 1961 states and 2776 transitions. [2020-10-27 20:10:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:18,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:10:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:18,032 INFO L225 Difference]: With dead ends: 1961 [2020-10-27 20:10:18,032 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:10:18,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:10:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:10:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:10:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:10:18,037 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-27 20:10:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:18,037 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:10:18,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:10:18,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:10:18,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:10:18,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:10:18,765 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 33 [2020-10-27 20:10:18,821 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 20:10:18,822 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 20:10:18,822 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 20:10:18,822 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 20:10:18,822 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:10:18,823 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 20:10:18,823 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:10:18,823 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:10:18,823 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:10:18,823 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:10:18,823 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:10:18,823 INFO L274 CegarLoopResult]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L274 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L274 CegarLoopResult]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L274 CegarLoopResult]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L274 CegarLoopResult]: For program point L95(line 95) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L274 CegarLoopResult]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2020-10-27 20:10:18,824 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2020-10-27 20:10:18,825 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-10-27 20:10:18,825 INFO L277 CegarLoopResult]: At program point L105(lines 7 109) the Hoare annotation is: true [2020-10-27 20:10:18,825 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-10-27 20:10:18,825 INFO L274 CegarLoopResult]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,825 INFO L274 CegarLoopResult]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,825 INFO L274 CegarLoopResult]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,825 INFO L274 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-10-27 20:10:18,825 INFO L274 CegarLoopResult]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,826 INFO L274 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-10-27 20:10:18,826 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-27 20:10:18,826 INFO L274 CegarLoopResult]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,826 INFO L277 CegarLoopResult]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2020-10-27 20:10:18,826 INFO L274 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-10-27 20:10:18,826 INFO L274 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-10-27 20:10:18,826 INFO L270 CegarLoopResult]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2020-10-27 20:10:18,826 INFO L274 CegarLoopResult]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,827 INFO L274 CegarLoopResult]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 20:10:18,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:10:18 BoogieIcfgContainer [2020-10-27 20:10:18,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:10:18,841 INFO L168 Benchmark]: Toolchain (without parser) took 7993.26 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 127.2 MB in the beginning and 148.9 MB in the end (delta: -21.7 MB). Peak memory consumption was 120.9 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:18,841 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 104.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:10:18,842 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.28 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:18,843 INFO L168 Benchmark]: Boogie Preprocessor took 40.34 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:18,843 INFO L168 Benchmark]: RCFGBuilder took 544.27 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 98.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:18,844 INFO L168 Benchmark]: TraceAbstraction took 7114.51 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 98.0 MB in the beginning and 148.9 MB in the end (delta: -50.9 MB). Peak memory consumption was 91.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:18,847 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 104.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.28 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.34 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 544.27 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 98.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7114.51 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 98.0 MB in the beginning and 148.9 MB in the end (delta: -50.9 MB). Peak memory consumption was 91.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 656 SDtfs, 903 SDslu, 93 SDs, 0 SdLazy, 489 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=873occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 250 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 85 NumberOfFragments, 38 HoareAnnotationTreeSize, 19 FomulaSimplifications, 207333 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 246 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 14660 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...