./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:41:08,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:41:08,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:41:08,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:41:08,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:41:08,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:41:08,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:41:08,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:41:08,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:41:08,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:41:08,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:41:08,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:41:08,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:41:08,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:41:08,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:41:08,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:41:08,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:41:08,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:41:08,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:41:08,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:41:08,743 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:41:08,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:41:08,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:41:08,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:41:08,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:41:08,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:41:08,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:41:08,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:41:08,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:41:08,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:41:08,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:41:08,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:41:08,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:41:08,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:41:08,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:41:08,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:41:08,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:41:08,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:41:08,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:41:08,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:41:08,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:41:08,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:41:08,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:41:08,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:41:08,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:41:08,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:41:08,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:41:08,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:41:08,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:41:08,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:41:08,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:41:08,791 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:41:08,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:41:08,792 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:41:08,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:41:08,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:41:08,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:41:08,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:41:08,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:41:08,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:41:08,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:41:08,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:41:08,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:41:08,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:41:08,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:41:08,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:41:08,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:41:08,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:41:08,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:41:08,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:41:08,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:41:08,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:41:08,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:41:08,796 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:41:08,796 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:41:08,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:41:08,797 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2022-07-22 09:41:09,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:41:09,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:41:09,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:41:09,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:41:09,056 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:41:09,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2022-07-22 09:41:09,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22673a500/8703f14921bc4eb1bb0263c1a66c1ae4/FLAG332d50b8f [2022-07-22 09:41:09,438 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:41:09,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2022-07-22 09:41:09,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22673a500/8703f14921bc4eb1bb0263c1a66c1ae4/FLAG332d50b8f [2022-07-22 09:41:09,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22673a500/8703f14921bc4eb1bb0263c1a66c1ae4 [2022-07-22 09:41:09,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:41:09,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:41:09,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:41:09,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:41:09,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:41:09,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:09" (1/1) ... [2022-07-22 09:41:09,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6db8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:09, skipping insertion in model container [2022-07-22 09:41:09,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:09" (1/1) ... [2022-07-22 09:41:09,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:41:09,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:41:10,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-07-22 09:41:10,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:41:10,052 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:41:10,086 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-07-22 09:41:10,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:41:10,097 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:41:10,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10 WrapperNode [2022-07-22 09:41:10,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:41:10,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:41:10,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:41:10,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:41:10,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,132 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-07-22 09:41:10,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:41:10,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:41:10,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:41:10,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:41:10,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:41:10,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:41:10,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:41:10,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:41:10,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (1/1) ... [2022-07-22 09:41:10,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:41:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:10,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 09:41:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:41:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:41:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:41:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:41:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:41:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:41:10,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:41:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:41:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:41:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-22 09:41:10,230 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-22 09:41:10,309 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:41:10,311 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:41:10,498 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:41:10,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:41:10,503 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:41:10,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:10 BoogieIcfgContainer [2022-07-22 09:41:10,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:41:10,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:41:10,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:41:10,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:41:10,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:41:09" (1/3) ... [2022-07-22 09:41:10,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9ce75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:10, skipping insertion in model container [2022-07-22 09:41:10,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:10" (2/3) ... [2022-07-22 09:41:10,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9ce75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:10, skipping insertion in model container [2022-07-22 09:41:10,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:10" (3/3) ... [2022-07-22 09:41:10,521 INFO L111 eAbstractionObserver]: Analyzing ICFG sep.i [2022-07-22 09:41:10,539 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:41:10,540 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:41:10,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:41:10,600 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1ccb571a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c2de39c [2022-07-22 09:41:10,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:41:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:41:10,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:10,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:10,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2022-07-22 09:41:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:10,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186469411] [2022-07-22 09:41:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:10,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:10,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:41:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:10,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:41:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 09:41:10,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:10,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186469411] [2022-07-22 09:41:10,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186469411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:10,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045164357] [2022-07-22 09:41:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:10,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:10,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:11,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:41:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 09:41:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 09:41:11,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:41:11,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045164357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:11,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:41:11,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2022-07-22 09:41:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000765340] [2022-07-22 09:41:11,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:41:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:41:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:41:11,129 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:11,143 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2022-07-22 09:41:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:41:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-22 09:41:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:11,151 INFO L225 Difference]: With dead ends: 50 [2022-07-22 09:41:11,151 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 09:41:11,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:41:11,158 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:11,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 09:41:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-22 09:41:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-22 09:41:11,211 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2022-07-22 09:41:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:11,212 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-22 09:41:11,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-22 09:41:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:41:11,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:11,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:11,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:11,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 09:41:11,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2022-07-22 09:41:11,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777918482] [2022-07-22 09:41:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:11,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:11,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:41:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:11,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:41:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 09:41:11,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:11,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777918482] [2022-07-22 09:41:11,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777918482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:11,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785724618] [2022-07-22 09:41:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:11,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:11,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:11,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:11,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:41:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:41:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 09:41:11,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:41:11,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785724618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:11,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:41:11,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-22 09:41:11,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697619024] [2022-07-22 09:41:11,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:11,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:41:11,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:11,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:41:11,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:41:11,666 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:11,697 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-07-22 09:41:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:41:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-22 09:41:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:11,698 INFO L225 Difference]: With dead ends: 43 [2022-07-22 09:41:11,698 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 09:41:11,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:41:11,700 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:11,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 09:41:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-07-22 09:41:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-22 09:41:11,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-22 09:41:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:11,707 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-22 09:41:11,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-22 09:41:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 09:41:11,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:11,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:11,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:11,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-22 09:41:11,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2022-07-22 09:41:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:11,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828253069] [2022-07-22 09:41:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:11,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:11,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:41:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:41:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 09:41:12,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:12,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828253069] [2022-07-22 09:41:12,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828253069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:12,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:41:12,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:41:12,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364483274] [2022-07-22 09:41:12,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:12,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:41:12,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:41:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:41:12,031 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:12,059 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-22 09:41:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:41:12,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-22 09:41:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:12,060 INFO L225 Difference]: With dead ends: 39 [2022-07-22 09:41:12,060 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 09:41:12,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:41:12,062 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:12,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 09:41:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-22 09:41:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-22 09:41:12,068 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2022-07-22 09:41:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:12,068 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-22 09:41:12,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-22 09:41:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 09:41:12,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:12,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 09:41:12,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2022-07-22 09:41:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:12,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086399804] [2022-07-22 09:41:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:12,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:41:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:41:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:12,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086399804] [2022-07-22 09:41:12,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086399804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:12,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080954778] [2022-07-22 09:41:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:12,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:12,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:12,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:12,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:41:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:41:12,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 09:41:12,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:12,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080954778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:12,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:12,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-07-22 09:41:12,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195175867] [2022-07-22 09:41:12,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:12,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 09:41:12,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 09:41:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 09:41:12,402 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:12,467 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-07-22 09:41:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 09:41:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-22 09:41:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:12,468 INFO L225 Difference]: With dead ends: 49 [2022-07-22 09:41:12,469 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 09:41:12,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-22 09:41:12,470 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:12,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 09:41:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-22 09:41:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-22 09:41:12,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2022-07-22 09:41:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:12,476 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-22 09:41:12,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-22 09:41:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:41:12,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:12,478 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:12,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:12,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:12,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2022-07-22 09:41:12,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:12,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323308387] [2022-07-22 09:41:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:12,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:12,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:41:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:13,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:41:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 09:41:13,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:13,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323308387] [2022-07-22 09:41:13,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323308387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315967882] [2022-07-22 09:41:13,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:41:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:13,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:13,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:41:13,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:41:13,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:41:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:41:13,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:41:14,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315967882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:14,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:14,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-22 09:41:14,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885521554] [2022-07-22 09:41:14,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:14,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 09:41:14,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 09:41:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:41:14,063 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:41:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:14,239 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2022-07-22 09:41:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:41:14,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-22 09:41:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:14,243 INFO L225 Difference]: With dead ends: 73 [2022-07-22 09:41:14,243 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 09:41:14,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:41:14,245 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:14,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 478 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:41:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 09:41:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-07-22 09:41:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 09:41:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-07-22 09:41:14,261 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2022-07-22 09:41:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:14,262 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-07-22 09:41:14,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:41:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-07-22 09:41:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:41:14,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:14,264 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:14,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:14,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:14,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2022-07-22 09:41:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:14,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047254922] [2022-07-22 09:41:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:14,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:14,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:14,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:41:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:14,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:41:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 09:41:14,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:14,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047254922] [2022-07-22 09:41:14,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047254922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791132073] [2022-07-22 09:41:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:14,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:14,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:14,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:41:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 09:41:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:15,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-22 09:41:15,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-22 09:41:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:41:15,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:15,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-07-22 09:41:15,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-22 09:41:16,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-22 09:41:16,240 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-22 09:41:16,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:41:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:41:16,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791132073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:16,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:16,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 45 [2022-07-22 09:41:16,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795454951] [2022-07-22 09:41:16,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:16,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 09:41:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 09:41:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 09:41:16,412 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 09:41:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:22,440 INFO L93 Difference]: Finished difference Result 274 states and 426 transitions. [2022-07-22 09:41:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-22 09:41:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-07-22 09:41:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:22,446 INFO L225 Difference]: With dead ends: 274 [2022-07-22 09:41:22,446 INFO L226 Difference]: Without dead ends: 225 [2022-07-22 09:41:22,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4147 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1967, Invalid=10241, Unknown=2, NotChecked=0, Total=12210 [2022-07-22 09:41:22,453 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 278 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:22,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 341 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 943 Invalid, 0 Unknown, 359 Unchecked, 0.7s Time] [2022-07-22 09:41:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-22 09:41:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2022-07-22 09:41:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 139 states have (on average 1.330935251798561) internal successors, (185), 143 states have internal predecessors, (185), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (54), 13 states have call predecessors, (54), 13 states have call successors, (54) [2022-07-22 09:41:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 252 transitions. [2022-07-22 09:41:22,489 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 252 transitions. Word has length 48 [2022-07-22 09:41:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:22,489 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 252 transitions. [2022-07-22 09:41:22,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 09:41:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 252 transitions. [2022-07-22 09:41:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:41:22,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:22,493 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:22,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:22,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:22,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash 296963572, now seen corresponding path program 2 times [2022-07-22 09:41:22,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:22,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096130962] [2022-07-22 09:41:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:41:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:41:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 09:41:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096130962] [2022-07-22 09:41:22,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096130962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187261246] [2022-07-22 09:41:22,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:41:22,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:22,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:22,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:41:23,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:41:23,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 09:41:23,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:23,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-07-22 09:41:23,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-22 09:41:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:41:28,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:28,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-22 09:41:28,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-22 09:41:28,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-07-22 09:41:28,935 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-22 09:41:28,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:41:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:41:29,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187261246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:29,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:29,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 18] total 44 [2022-07-22 09:41:29,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447445134] [2022-07-22 09:41:29,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:29,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 09:41:29,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:29,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 09:41:29,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1651, Unknown=2, NotChecked=0, Total=1892 [2022-07-22 09:41:29,116 INFO L87 Difference]: Start difference. First operand 161 states and 252 transitions. Second operand has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 09:42:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:42:48,433 INFO L93 Difference]: Finished difference Result 613 states and 960 transitions. [2022-07-22 09:42:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-22 09:42:48,434 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2022-07-22 09:42:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:42:48,444 INFO L225 Difference]: With dead ends: 613 [2022-07-22 09:42:48,445 INFO L226 Difference]: Without dead ends: 475 [2022-07-22 09:42:48,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6702 ImplicationChecksByTransitivity, 83.6s TimeCoverageRelationStatistics Valid=2657, Invalid=15946, Unknown=29, NotChecked=0, Total=18632 [2022-07-22 09:42:48,450 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 386 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 705 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:42:48,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 435 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1170 Invalid, 0 Unknown, 705 Unchecked, 1.0s Time] [2022-07-22 09:42:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-22 09:42:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2022-07-22 09:42:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 252 states have internal predecessors, (327), 21 states have call successors, (21), 6 states have call predecessors, (21), 16 states have return successors, (119), 21 states have call predecessors, (119), 21 states have call successors, (119) [2022-07-22 09:42:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 467 transitions. [2022-07-22 09:42:48,512 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 467 transitions. Word has length 48 [2022-07-22 09:42:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:42:48,516 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 467 transitions. [2022-07-22 09:42:48,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 09:42:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 467 transitions. [2022-07-22 09:42:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:42:48,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:42:48,527 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:42:48,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:42:48,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:48,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:42:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:42:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 3 times [2022-07-22 09:42:48,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:42:48,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559950881] [2022-07-22 09:42:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:42:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:42:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:48,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:42:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:48,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:42:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:49,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:42:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 09:42:49,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:42:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559950881] [2022-07-22 09:42:49,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559950881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991959758] [2022-07-22 09:42:49,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:42:49,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:42:49,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:42:49,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:42:49,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 09:42:49,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:42:49,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 09:42:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:42:49,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:49,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-07-22 09:42:49,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-07-22 09:42:49,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-22 09:42:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:42:50,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:42:50,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991959758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:50,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:42:50,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2022-07-22 09:42:50,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805169058] [2022-07-22 09:42:50,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:42:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 09:42:50,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:42:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 09:42:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:42:50,241 INFO L87 Difference]: Start difference. First operand 280 states and 467 transitions. Second operand has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 09:42:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:42:51,371 INFO L93 Difference]: Finished difference Result 665 states and 1063 transitions. [2022-07-22 09:42:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 09:42:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-07-22 09:42:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:42:51,376 INFO L225 Difference]: With dead ends: 665 [2022-07-22 09:42:51,376 INFO L226 Difference]: Without dead ends: 407 [2022-07-22 09:42:51,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=418, Invalid=3122, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 09:42:51,379 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:42:51,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 366 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 496 Invalid, 0 Unknown, 692 Unchecked, 0.4s Time] [2022-07-22 09:42:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-22 09:42:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 344. [2022-07-22 09:42:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 298 states have (on average 1.3389261744966443) internal successors, (399), 308 states have internal predecessors, (399), 26 states have call successors, (26), 9 states have call predecessors, (26), 19 states have return successors, (158), 26 states have call predecessors, (158), 26 states have call successors, (158) [2022-07-22 09:42:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 583 transitions. [2022-07-22 09:42:51,424 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 583 transitions. Word has length 48 [2022-07-22 09:42:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:42:51,424 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 583 transitions. [2022-07-22 09:42:51,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 09:42:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 583 transitions. [2022-07-22 09:42:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:42:51,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:42:51,428 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:42:51,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:42:51,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:51,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:42:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:42:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 4 times [2022-07-22 09:42:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:42:51,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347200092] [2022-07-22 09:42:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:42:51,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:42:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:51,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:42:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:42:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:42:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 09:42:51,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:42:51,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347200092] [2022-07-22 09:42:51,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347200092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:51,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087161634] [2022-07-22 09:42:51,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:42:51,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:51,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:42:51,897 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:42:51,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:42:51,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:42:51,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:42:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:42:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:42:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 09:42:52,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:42:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 09:42:52,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087161634] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:42:52,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:42:52,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-22 09:42:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820531430] [2022-07-22 09:42:52,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:42:52,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 09:42:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:42:52,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 09:42:52,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:42:52,568 INFO L87 Difference]: Start difference. First operand 344 states and 583 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:42:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:42:52,749 INFO L93 Difference]: Finished difference Result 578 states and 1173 transitions. [2022-07-22 09:42:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:42:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-22 09:42:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:42:52,756 INFO L225 Difference]: With dead ends: 578 [2022-07-22 09:42:52,757 INFO L226 Difference]: Without dead ends: 574 [2022-07-22 09:42:52,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:42:52,759 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:42:52,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 606 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:42:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-07-22 09:42:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 446. [2022-07-22 09:42:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 388 states have (on average 1.3685567010309279) internal successors, (531), 403 states have internal predecessors, (531), 33 states have call successors, (33), 9 states have call predecessors, (33), 24 states have return successors, (259), 33 states have call predecessors, (259), 33 states have call successors, (259) [2022-07-22 09:42:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 823 transitions. [2022-07-22 09:42:52,829 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 823 transitions. Word has length 48 [2022-07-22 09:42:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:42:52,830 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 823 transitions. [2022-07-22 09:42:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:42:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 823 transitions. [2022-07-22 09:42:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:42:52,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:42:52,835 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:42:52,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:42:53,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 09:42:53,052 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:42:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:42:53,052 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 5 times [2022-07-22 09:42:53,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:42:53,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196923683] [2022-07-22 09:42:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:42:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:42:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:53,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:42:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:53,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:42:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:53,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:42:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 09:42:53,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:42:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196923683] [2022-07-22 09:42:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196923683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691035342] [2022-07-22 09:42:53,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:42:53,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:42:53,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:42:53,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:42:53,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 09:42:53,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:42:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 09:42:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:42:53,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:53,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-07-22 09:42:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:42:53,960 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-07-22 09:42:53,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-07-22 09:42:54,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:54,060 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-07-22 09:42:54,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2022-07-22 09:42:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:42:54,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:42:56,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691035342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:56,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:42:56,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2022-07-22 09:42:56,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431637449] [2022-07-22 09:42:56,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:42:56,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 09:42:56,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:42:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 09:42:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1438, Unknown=2, NotChecked=0, Total=1640 [2022-07-22 09:42:56,109 INFO L87 Difference]: Start difference. First operand 446 states and 823 transitions. Second operand has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 09:42:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:42:58,023 INFO L93 Difference]: Finished difference Result 972 states and 1642 transitions. [2022-07-22 09:42:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-22 09:42:58,023 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-22 09:42:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:42:58,031 INFO L225 Difference]: With dead ends: 972 [2022-07-22 09:42:58,031 INFO L226 Difference]: Without dead ends: 673 [2022-07-22 09:42:58,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=842, Invalid=6128, Unknown=2, NotChecked=0, Total=6972 [2022-07-22 09:42:58,038 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 225 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:42:58,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 360 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 722 Invalid, 0 Unknown, 305 Unchecked, 0.6s Time] [2022-07-22 09:42:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-22 09:42:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 470. [2022-07-22 09:42:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 413 states have (on average 1.3438256658595642) internal successors, (555), 424 states have internal predecessors, (555), 32 states have call successors, (32), 15 states have call predecessors, (32), 24 states have return successors, (186), 30 states have call predecessors, (186), 32 states have call successors, (186) [2022-07-22 09:42:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 773 transitions. [2022-07-22 09:42:58,113 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 773 transitions. Word has length 48 [2022-07-22 09:42:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:42:58,113 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 773 transitions. [2022-07-22 09:42:58,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 09:42:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 773 transitions. [2022-07-22 09:42:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:42:58,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:42:58,117 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:42:58,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:42:58,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 09:42:58,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:42:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:42:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash -779053714, now seen corresponding path program 6 times [2022-07-22 09:42:58,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:42:58,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395449633] [2022-07-22 09:42:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:42:58,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:42:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:42:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:58,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:42:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:58,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:42:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:42:58,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:42:58,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395449633] [2022-07-22 09:42:58,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395449633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:58,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560527466] [2022-07-22 09:42:58,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:42:58,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:42:58,900 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:42:58,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:42:59,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 09:42:59,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:42:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 09:42:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:42:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:59,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-07-22 09:42:59,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:59,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-07-22 09:42:59,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:59,427 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-07-22 09:42:59,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2022-07-22 09:42:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:42:59,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:43:00,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560527466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:43:00,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:43:00,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-07-22 09:43:00,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875098914] [2022-07-22 09:43:00,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:43:00,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 09:43:00,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:43:00,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 09:43:00,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1527, Unknown=1, NotChecked=0, Total=1722 [2022-07-22 09:43:00,425 INFO L87 Difference]: Start difference. First operand 470 states and 773 transitions. Second operand has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 09:43:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:43:03,386 INFO L93 Difference]: Finished difference Result 1182 states and 1849 transitions. [2022-07-22 09:43:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-22 09:43:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-22 09:43:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:43:03,394 INFO L225 Difference]: With dead ends: 1182 [2022-07-22 09:43:03,394 INFO L226 Difference]: Without dead ends: 984 [2022-07-22 09:43:03,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1290, Invalid=12281, Unknown=1, NotChecked=0, Total=13572 [2022-07-22 09:43:03,402 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 172 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:43:03,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 548 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 861 Invalid, 0 Unknown, 975 Unchecked, 0.6s Time] [2022-07-22 09:43:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-07-22 09:43:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 735. [2022-07-22 09:43:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 649 states have (on average 1.3343605546995378) internal successors, (866), 671 states have internal predecessors, (866), 43 states have call successors, (43), 21 states have call predecessors, (43), 42 states have return successors, (255), 42 states have call predecessors, (255), 43 states have call successors, (255) [2022-07-22 09:43:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1164 transitions. [2022-07-22 09:43:03,509 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1164 transitions. Word has length 48 [2022-07-22 09:43:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:43:03,510 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1164 transitions. [2022-07-22 09:43:03,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 09:43:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1164 transitions. [2022-07-22 09:43:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:43:03,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:43:03,514 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:43:03,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:43:03,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 09:43:03,727 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:43:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:43:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -299993678, now seen corresponding path program 1 times [2022-07-22 09:43:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:43:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930480415] [2022-07-22 09:43:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:43:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:43:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:03,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:43:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:43:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:03,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:43:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:43:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:43:03,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930480415] [2022-07-22 09:43:03,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930480415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:43:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077644528] [2022-07-22 09:43:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:43:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:43:03,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:43:03,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:43:03,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:43:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:04,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:43:04,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:43:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:43:04,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:43:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:43:04,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077644528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:43:04,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:43:04,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2022-07-22 09:43:04,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281078227] [2022-07-22 09:43:04,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:43:04,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:43:04,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:43:04,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:43:04,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:43:04,730 INFO L87 Difference]: Start difference. First operand 735 states and 1164 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:43:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:43:04,954 INFO L93 Difference]: Finished difference Result 1018 states and 1838 transitions. [2022-07-22 09:43:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:43:04,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-22 09:43:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:43:04,967 INFO L225 Difference]: With dead ends: 1018 [2022-07-22 09:43:04,967 INFO L226 Difference]: Without dead ends: 1014 [2022-07-22 09:43:04,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:43:04,970 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:43:04,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 615 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:43:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-07-22 09:43:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 889. [2022-07-22 09:43:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 788 states have (on average 1.3565989847715736) internal successors, (1069), 819 states have internal predecessors, (1069), 50 states have call successors, (50), 21 states have call predecessors, (50), 50 states have return successors, (341), 48 states have call predecessors, (341), 50 states have call successors, (341) [2022-07-22 09:43:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1460 transitions. [2022-07-22 09:43:05,109 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1460 transitions. Word has length 48 [2022-07-22 09:43:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:43:05,110 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1460 transitions. [2022-07-22 09:43:05,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:43:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1460 transitions. [2022-07-22 09:43:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 09:43:05,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:43:05,115 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:43:05,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:43:05,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 09:43:05,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:43:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:43:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash 485005286, now seen corresponding path program 3 times [2022-07-22 09:43:05,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:43:05,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190246577] [2022-07-22 09:43:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:43:05,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:43:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:05,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:43:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:05,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:43:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:05,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:43:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:43:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:43:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190246577] [2022-07-22 09:43:05,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190246577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:43:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909331933] [2022-07-22 09:43:05,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:43:05,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:43:05,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:43:05,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:43:05,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:43:05,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 09:43:05,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:43:05,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 09:43:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:43:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 09:43:05,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:43:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 09:43:05,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909331933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:43:05,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:43:05,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2022-07-22 09:43:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850226629] [2022-07-22 09:43:05,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:43:05,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 09:43:05,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:43:05,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 09:43:05,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:43:05,692 INFO L87 Difference]: Start difference. First operand 889 states and 1460 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:43:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:43:05,951 INFO L93 Difference]: Finished difference Result 1163 states and 1857 transitions. [2022-07-22 09:43:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 09:43:05,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-07-22 09:43:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:43:05,954 INFO L225 Difference]: With dead ends: 1163 [2022-07-22 09:43:05,954 INFO L226 Difference]: Without dead ends: 378 [2022-07-22 09:43:05,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:43:05,960 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:43:05,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 214 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:43:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-22 09:43:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 260. [2022-07-22 09:43:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 229 states have (on average 1.3537117903930131) internal successors, (310), 240 states have internal predecessors, (310), 16 states have call successors, (16), 4 states have call predecessors, (16), 14 states have return successors, (84), 15 states have call predecessors, (84), 16 states have call successors, (84) [2022-07-22 09:43:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 410 transitions. [2022-07-22 09:43:06,009 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 410 transitions. Word has length 51 [2022-07-22 09:43:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:43:06,010 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 410 transitions. [2022-07-22 09:43:06,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:43:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 410 transitions. [2022-07-22 09:43:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 09:43:06,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:43:06,012 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:43:06,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:43:06,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 09:43:06,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:43:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:43:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash 820316862, now seen corresponding path program 4 times [2022-07-22 09:43:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:43:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714302570] [2022-07-22 09:43:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:43:06,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:43:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:06,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:43:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:06,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:43:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:06,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:43:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 09:43:06,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:43:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714302570] [2022-07-22 09:43:06,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714302570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:43:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888076997] [2022-07-22 09:43:06,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:43:06,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:43:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:43:06,608 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:43:06,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:43:06,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:43:06,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:43:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 09:43:06,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:43:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 09:43:07,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:43:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 09:43:07,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888076997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:43:07,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:43:07,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-07-22 09:43:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068194051] [2022-07-22 09:43:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:43:07,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:43:07,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:43:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:43:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:43:07,382 INFO L87 Difference]: Start difference. First operand 260 states and 410 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:43:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:43:07,575 INFO L93 Difference]: Finished difference Result 376 states and 668 transitions. [2022-07-22 09:43:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:43:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-07-22 09:43:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:43:07,579 INFO L225 Difference]: With dead ends: 376 [2022-07-22 09:43:07,579 INFO L226 Difference]: Without dead ends: 372 [2022-07-22 09:43:07,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 15 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:43:07,580 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:43:07,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 702 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:43:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-07-22 09:43:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 300. [2022-07-22 09:43:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 265 states have (on average 1.369811320754717) internal successors, (363), 278 states have internal predecessors, (363), 18 states have call successors, (18), 4 states have call predecessors, (18), 16 states have return successors, (115), 17 states have call predecessors, (115), 18 states have call successors, (115) [2022-07-22 09:43:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 496 transitions. [2022-07-22 09:43:07,638 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 496 transitions. Word has length 59 [2022-07-22 09:43:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:43:07,638 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 496 transitions. [2022-07-22 09:43:07,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 09:43:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 496 transitions. [2022-07-22 09:43:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 09:43:07,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:43:07,641 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:43:07,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 09:43:07,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 09:43:07,860 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:43:07,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:43:07,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1500375232, now seen corresponding path program 7 times [2022-07-22 09:43:07,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:43:07,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313718338] [2022-07-22 09:43:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:43:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:43:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:07,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:43:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:08,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:43:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:08,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:43:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 09:43:08,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:43:08,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313718338] [2022-07-22 09:43:08,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313718338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:43:08,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049754337] [2022-07-22 09:43:08,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:43:08,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:43:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:43:08,264 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:43:08,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:43:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 09:43:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:43:08,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-22 09:43:08,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-22 09:43:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 09:43:09,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:43:09,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-07-22 09:43:09,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-22 09:43:09,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-22 09:43:09,473 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-22 09:43:09,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:43:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 09:43:09,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049754337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:43:09,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:43:09,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 19] total 47 [2022-07-22 09:43:09,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042132913] [2022-07-22 09:43:09,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:43:09,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:43:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:43:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:43:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:43:09,640 INFO L87 Difference]: Start difference. First operand 300 states and 496 transitions. Second operand has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 09:43:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:43:14,401 INFO L93 Difference]: Finished difference Result 1230 states and 2018 transitions. [2022-07-22 09:43:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-07-22 09:43:14,408 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2022-07-22 09:43:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:43:14,413 INFO L225 Difference]: With dead ends: 1230 [2022-07-22 09:43:14,414 INFO L226 Difference]: Without dead ends: 996 [2022-07-22 09:43:14,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7169 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2262, Invalid=18908, Unknown=0, NotChecked=0, Total=21170 [2022-07-22 09:43:14,419 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 362 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:43:14,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 613 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1612 Invalid, 0 Unknown, 447 Unchecked, 1.2s Time] [2022-07-22 09:43:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-07-22 09:43:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 652. [2022-07-22 09:43:14,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 585 states have (on average 1.3846153846153846) internal successors, (810), 613 states have internal predecessors, (810), 28 states have call successors, (28), 11 states have call predecessors, (28), 38 states have return successors, (262), 27 states have call predecessors, (262), 28 states have call successors, (262) [2022-07-22 09:43:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1100 transitions. [2022-07-22 09:43:14,555 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1100 transitions. Word has length 59 [2022-07-22 09:43:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:43:14,555 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 1100 transitions. [2022-07-22 09:43:14,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 09:43:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1100 transitions. [2022-07-22 09:43:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 09:43:14,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:43:14,566 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:43:14,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 09:43:14,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:43:14,791 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:43:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:43:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1078482300, now seen corresponding path program 8 times [2022-07-22 09:43:14,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:43:14,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108305949] [2022-07-22 09:43:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:43:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:43:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:15,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:43:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:15,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:43:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:15,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:43:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:43:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:43:15,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:43:15,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108305949] [2022-07-22 09:43:15,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108305949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:43:15,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190963301] [2022-07-22 09:43:15,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:43:15,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:43:15,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:43:15,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:43:15,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:43:15,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:43:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:43:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 09:43:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:43:15,893 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:15,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 09:43:15,937 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:43:15,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2022-07-22 09:43:16,007 INFO L356 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2022-07-22 09:43:16,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2022-07-22 09:43:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:43:23,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:43:27,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-07-22 09:43:27,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-07-22 09:43:27,650 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:43:27,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2022-07-22 09:43:27,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-07-22 09:43:27,670 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:43:27,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 58 [2022-07-22 09:43:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 141 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 09:43:27,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190963301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:43:27,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:43:27,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 62 [2022-07-22 09:43:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043229363] [2022-07-22 09:43:27,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:43:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 09:43:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:43:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 09:43:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3394, Unknown=6, NotChecked=0, Total=3782 [2022-07-22 09:43:27,986 INFO L87 Difference]: Start difference. First operand 652 states and 1100 transitions. Second operand has 62 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9)