/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:30:08,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:30:08,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:30:09,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:30:09,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:30:09,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:30:09,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:30:09,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:30:09,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:30:09,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:30:09,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:30:09,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:30:09,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:30:09,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:30:09,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:30:09,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:30:09,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:30:09,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:30:09,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:30:09,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:30:09,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:30:09,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:30:09,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:30:09,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:30:09,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:30:09,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:30:09,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:30:09,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:30:09,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:30:09,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:30:09,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:30:09,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:30:09,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:30:09,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:30:09,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:30:09,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:30:09,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:30:09,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:30:09,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:30:09,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:30:09,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:30:09,132 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 05:30:09,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:30:09,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:30:09,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:30:09,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:30:09,191 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:30:09,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:30:09,192 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:30:09,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:30:09,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:30:09,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:30:09,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:30:09,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:30:09,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:30:09,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:30:09,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:30:09,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:30:09,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:30:09,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:30:09,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:30:09,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:30:09,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:30:09,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:30:09,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:30:09,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:30:09,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:30:09,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:30:09,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:30:09,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:30:09,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:30:09,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:30:09,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:30:09,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:30:09,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:30:09,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:30:09,687 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:30:09,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 05:30:09,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5e3fe803/39578790c8e84c56ac16cc855eb9b591/FLAG7c9da592e [2020-10-27 05:30:11,077 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:30:11,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 05:30:11,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5e3fe803/39578790c8e84c56ac16cc855eb9b591/FLAG7c9da592e [2020-10-27 05:30:11,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5e3fe803/39578790c8e84c56ac16cc855eb9b591 [2020-10-27 05:30:11,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:30:11,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:30:11,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:30:11,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:30:11,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:30:11,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:30:11" (1/1) ... [2020-10-27 05:30:11,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2d07d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:11, skipping insertion in model container [2020-10-27 05:30:11,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:30:11" (1/1) ... [2020-10-27 05:30:11,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:30:11,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:30:13,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:30:13,922 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:30:15,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:30:15,180 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:30:15,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15 WrapperNode [2020-10-27 05:30:15,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:30:15,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:30:15,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:30:15,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:30:15,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (1/1) ... [2020-10-27 05:30:15,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (1/1) ... [2020-10-27 05:30:15,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (1/1) ... [2020-10-27 05:30:15,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (1/1) ... [2020-10-27 05:30:15,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (1/1) ... [2020-10-27 05:30:15,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (1/1) ... [2020-10-27 05:30:15,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (1/1) ... [2020-10-27 05:30:15,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:30:15,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:30:15,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:30:15,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:30:15,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (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 05:30:15,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:30:15,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:30:15,706 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:30:15,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:30:15,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:30:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:30:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:30:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:30:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:30:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:30:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:30:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:30:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:30:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:30:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:30:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:30:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:30:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:30:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:30:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:30:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:30:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-27 05:30:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:30:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:30:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:30:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:30:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:30:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:30:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:30:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:30:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:30:23,044 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:30:23,044 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:30:23,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:30:23 BoogieIcfgContainer [2020-10-27 05:30:23,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:30:23,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:30:23,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:30:23,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:30:23,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:30:11" (1/3) ... [2020-10-27 05:30:23,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14094376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:30:23, skipping insertion in model container [2020-10-27 05:30:23,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:30:15" (2/3) ... [2020-10-27 05:30:23,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14094376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:30:23, skipping insertion in model container [2020-10-27 05:30:23,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:30:23" (3/3) ... [2020-10-27 05:30:23,083 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 05:30:23,096 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:30:23,103 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:30:23,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:30:23,154 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:30:23,154 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:30:23,154 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:30:23,154 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:30:23,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:30:23,154 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:30:23,155 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:30:23,155 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:30:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states. [2020-10-27 05:30:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 05:30:23,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:30:23,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:30:23,238 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:30:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:30:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1948812266, now seen corresponding path program 1 times [2020-10-27 05:30:23,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:30:23,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275905680] [2020-10-27 05:30:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:30:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:24,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:24,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:25,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:25,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:25,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:26,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:27,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:28,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:28,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:28,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 05:30:28,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:30:28,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 05:30:28,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:30:28,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:30:28,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:30:28,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:30:33,020 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:30:33,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:30:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:33,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:33,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:30:33,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:30:33,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 05:30:33,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:30:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:30:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:30:33,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:33,340 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 05:30:33,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275905680] [2020-10-27 05:30:33,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:30:33,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:30:33,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575974949] [2020-10-27 05:30:33,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:30:33,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:30:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:30:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:30:33,368 INFO L87 Difference]: Start difference. First operand 2091 states. Second operand 6 states. [2020-10-27 05:30:37,684 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 808 [2020-10-27 05:31:03,220 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 806 [2020-10-27 05:31:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:04,411 INFO L93 Difference]: Finished difference Result 3633 states and 6476 transitions. [2020-10-27 05:31:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:31:04,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2020-10-27 05:31:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:04,448 INFO L225 Difference]: With dead ends: 3633 [2020-10-27 05:31:04,450 INFO L226 Difference]: Without dead ends: 2109 [2020-10-27 05:31:04,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:31:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2020-10-27 05:31:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2027. [2020-10-27 05:31:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-10-27 05:31:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2763 transitions. [2020-10-27 05:31:04,677 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2763 transitions. Word has length 106 [2020-10-27 05:31:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:04,678 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 2763 transitions. [2020-10-27 05:31:04,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:31:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2763 transitions. [2020-10-27 05:31:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 05:31:04,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:04,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:04,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:31:04,693 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1460411003, now seen corresponding path program 1 times [2020-10-27 05:31:04,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:04,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548735343] [2020-10-27 05:31:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:04,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:05,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:05,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:05,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:05,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:07,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:09,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:09,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:09,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 05:31:09,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:31:09,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 05:31:09,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:09,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:31:09,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:31:09,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:31:14,032 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:31:14,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:14,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:14,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:14,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:14,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 05:31:14,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:14,288 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 05:31:14,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548735343] [2020-10-27 05:31:14,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:14,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:31:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432817983] [2020-10-27 05:31:14,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:31:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:14,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:31:14,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:31:14,303 INFO L87 Difference]: Start difference. First operand 2027 states and 2763 transitions. Second operand 6 states. [2020-10-27 05:31:18,341 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-27 05:31:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:31,495 INFO L93 Difference]: Finished difference Result 3475 states and 4884 transitions. [2020-10-27 05:31:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:31:31,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-27 05:31:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:31,507 INFO L225 Difference]: With dead ends: 3475 [2020-10-27 05:31:31,507 INFO L226 Difference]: Without dead ends: 1771 [2020-10-27 05:31:31,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:31:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-10-27 05:31:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1771. [2020-10-27 05:31:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1771 states. [2020-10-27 05:31:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2473 transitions. [2020-10-27 05:31:31,599 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2473 transitions. Word has length 107 [2020-10-27 05:31:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:31,599 INFO L481 AbstractCegarLoop]: Abstraction has 1771 states and 2473 transitions. [2020-10-27 05:31:31,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:31:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2473 transitions. [2020-10-27 05:31:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 05:31:31,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:31,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:31,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:31:31,605 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1744702600, now seen corresponding path program 1 times [2020-10-27 05:31:31,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:31,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592781932] [2020-10-27 05:31:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:31,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:32,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:33,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:34,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:36,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:36,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 05:31:36,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:31:36,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 05:31:36,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:36,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:31:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:31:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:41,028 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:31:41,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:41,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:41,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:41,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:41,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:41,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 05:31:41,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:41,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:41,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:41,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:41,281 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 05:31:41,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592781932] [2020-10-27 05:31:41,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:41,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:31:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705072328] [2020-10-27 05:31:41,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:31:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:31:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:31:41,284 INFO L87 Difference]: Start difference. First operand 1771 states and 2473 transitions. Second operand 6 states. [2020-10-27 05:31:45,213 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification that was a NOOP. DAG size: 807 [2020-10-27 05:32:00,434 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-27 05:32:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:01,504 INFO L93 Difference]: Finished difference Result 4057 states and 5811 transitions. [2020-10-27 05:32:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:32:01,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-27 05:32:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:01,522 INFO L225 Difference]: With dead ends: 4057 [2020-10-27 05:32:01,522 INFO L226 Difference]: Without dead ends: 2478 [2020-10-27 05:32:01,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:32:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2020-10-27 05:32:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2396. [2020-10-27 05:32:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2020-10-27 05:32:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3459 transitions. [2020-10-27 05:32:01,673 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3459 transitions. Word has length 108 [2020-10-27 05:32:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:01,674 INFO L481 AbstractCegarLoop]: Abstraction has 2396 states and 3459 transitions. [2020-10-27 05:32:01,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:32:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3459 transitions. [2020-10-27 05:32:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:01,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:01,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:01,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:32:01,681 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash 367435518, now seen corresponding path program 1 times [2020-10-27 05:32:01,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:01,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812704825] [2020-10-27 05:32:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:01,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:01,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:02,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:02,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:03,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:03,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:03,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:04,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:06,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:06,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:06,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:32:06,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-27 05:32:06,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:32:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 05:32:06,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:32:10,785 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:32:10,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:10,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:10,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:10,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:10,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 05:32:10,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:10,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:10,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:10,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:10,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:11,019 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 05:32:11,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812704825] [2020-10-27 05:32:11,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:11,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:32:11,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751511567] [2020-10-27 05:32:11,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:32:11,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:32:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:32:11,023 INFO L87 Difference]: Start difference. First operand 2396 states and 3459 transitions. Second operand 6 states. [2020-10-27 05:32:14,987 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification that was a NOOP. DAG size: 808 [2020-10-27 05:32:30,132 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification that was a NOOP. DAG size: 806 [2020-10-27 05:32:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:31,126 INFO L93 Difference]: Finished difference Result 5328 states and 7639 transitions. [2020-10-27 05:32:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:32:31,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-10-27 05:32:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:31,144 INFO L225 Difference]: With dead ends: 5328 [2020-10-27 05:32:31,145 INFO L226 Difference]: Without dead ends: 3084 [2020-10-27 05:32:31,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:32:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2020-10-27 05:32:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3004. [2020-10-27 05:32:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3004 states. [2020-10-27 05:32:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 4256 transitions. [2020-10-27 05:32:31,366 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 4256 transitions. Word has length 109 [2020-10-27 05:32:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:31,367 INFO L481 AbstractCegarLoop]: Abstraction has 3004 states and 4256 transitions. [2020-10-27 05:32:31,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:32:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 4256 transitions. [2020-10-27 05:32:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:32:31,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:31,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:31,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:32:31,373 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:31,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1166200933, now seen corresponding path program 1 times [2020-10-27 05:32:31,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:31,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307719290] [2020-10-27 05:32:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:31,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:32,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:33,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:34,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:34,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:35,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:36,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:36,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:32:36,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:32:36,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 05:32:36,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:32:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:32:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:40,472 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:32:40,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:40,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:40,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:40,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:40,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 05:32:40,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:40,668 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 05:32:40,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307719290] [2020-10-27 05:32:40,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:40,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:32:40,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729665463] [2020-10-27 05:32:40,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:32:40,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:40,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:32:40,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:32:40,671 INFO L87 Difference]: Start difference. First operand 3004 states and 4256 transitions. Second operand 6 states. [2020-10-27 05:32:44,673 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-27 05:32:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:56,250 INFO L93 Difference]: Finished difference Result 5856 states and 8353 transitions. [2020-10-27 05:32:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:32:56,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2020-10-27 05:32:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:56,265 INFO L225 Difference]: With dead ends: 5856 [2020-10-27 05:32:56,266 INFO L226 Difference]: Without dead ends: 2963 [2020-10-27 05:32:56,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:32:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-10-27 05:32:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2963. [2020-10-27 05:32:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-10-27 05:32:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4203 transitions. [2020-10-27 05:32:56,513 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4203 transitions. Word has length 110 [2020-10-27 05:32:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:56,514 INFO L481 AbstractCegarLoop]: Abstraction has 2963 states and 4203 transitions. [2020-10-27 05:32:56,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:32:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4203 transitions. [2020-10-27 05:32:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:32:56,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:56,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:56,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:32:56,521 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:56,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2027610427, now seen corresponding path program 1 times [2020-10-27 05:32:56,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:56,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847028815] [2020-10-27 05:32:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:56,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:58,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:01,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:01,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:33:01,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:33:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 05:33:01,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:33:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:05,693 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:33:05,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:05,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:05,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:05,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:05,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 05:33:05,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:05,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:05,955 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 05:33:05,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847028815] [2020-10-27 05:33:05,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:05,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:05,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395650009] [2020-10-27 05:33:05,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:05,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:05,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:05,958 INFO L87 Difference]: Start difference. First operand 2963 states and 4203 transitions. Second operand 6 states. [2020-10-27 05:33:10,173 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 807 [2020-10-27 05:33:25,562 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-27 05:33:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:26,737 INFO L93 Difference]: Finished difference Result 7310 states and 10367 transitions. [2020-10-27 05:33:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:26,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-27 05:33:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:26,756 INFO L225 Difference]: With dead ends: 7310 [2020-10-27 05:33:26,756 INFO L226 Difference]: Without dead ends: 4442 [2020-10-27 05:33:26,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:33:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2020-10-27 05:33:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 4360. [2020-10-27 05:33:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4360 states. [2020-10-27 05:33:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 6168 transitions. [2020-10-27 05:33:27,083 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 6168 transitions. Word has length 111 [2020-10-27 05:33:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:27,084 INFO L481 AbstractCegarLoop]: Abstraction has 4360 states and 6168 transitions. [2020-10-27 05:33:27,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 6168 transitions. [2020-10-27 05:33:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 05:33:27,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:27,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:27,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:33:27,092 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash 763561700, now seen corresponding path program 1 times [2020-10-27 05:33:27,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:27,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047375593] [2020-10-27 05:33:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:27,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:27,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:29,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:30,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:30,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:32,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:32,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 05:33:32,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:33:32,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:33:32,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:32,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:33:32,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:32,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 05:33:32,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:36,442 WARN L193 SmtUtils]: Spent 3.97 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:33:36,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:36,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:36,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:36,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 05:33:36,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:36,631 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 05:33:36,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047375593] [2020-10-27 05:33:36,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:36,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:33:36,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324802762] [2020-10-27 05:33:36,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:33:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:33:36,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:33:36,634 INFO L87 Difference]: Start difference. First operand 4360 states and 6168 transitions. Second operand 10 states. [2020-10-27 05:33:44,949 WARN L193 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 815 DAG size of output: 811