./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/array-examples/standard_sentinel-2.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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 21:58:52,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 21:58:52,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 21:58:52,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 21:58:52,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 21:58:52,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 21:58:52,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 21:58:52,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 21:58:52,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 21:58:52,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 21:58:52,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 21:58:52,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 21:58:52,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 21:58:52,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 21:58:52,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 21:58:52,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 21:58:52,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 21:58:52,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 21:58:52,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 21:58:52,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 21:58:52,761 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 21:58:52,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 21:58:52,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 21:58:52,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 21:58:52,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 21:58:52,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 21:58:52,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 21:58:52,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 21:58:52,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 21:58:52,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 21:58:52,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 21:58:52,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 21:58:52,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 21:58:52,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 21:58:52,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 21:58:52,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 21:58:52,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 21:58:52,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 21:58:52,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 21:58:52,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 21:58:52,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 21:58:52,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 21:58:52,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 21:58:52,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 21:58:52,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 21:58:52,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 21:58:52,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 21:58:52,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 21:58:52,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 21:58:52,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 21:58:52,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 21:58:52,810 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 21:58:52,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 21:58:52,810 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 21:58:52,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 21:58:52,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 21:58:52,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 21:58:52,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 21:58:52,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 21:58:52,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 21:58:52,811 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 21:58:52,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 21:58:52,812 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 21:58:52,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 21:58:52,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 21:58:52,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 21:58:52,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 21:58:52,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:58:52,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 21:58:52,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 21:58:52,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 21:58:52,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 21:58:52,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 21:58:52,814 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 21:58:52,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 21:58:52,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 21:58:52,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2022-07-11 21:58:52,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 21:58:53,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 21:58:53,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 21:58:53,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 21:58:53,018 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 21:58:53,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-07-11 21:58:53,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365ac5fe8/4c27b63aae5046529321817392a4f0d4/FLAGe56cf1a90 [2022-07-11 21:58:53,389 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 21:58:53,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-07-11 21:58:53,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365ac5fe8/4c27b63aae5046529321817392a4f0d4/FLAGe56cf1a90 [2022-07-11 21:58:53,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365ac5fe8/4c27b63aae5046529321817392a4f0d4 [2022-07-11 21:58:53,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 21:58:53,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 21:58:53,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 21:58:53,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 21:58:53,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 21:58:53,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:53,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347c2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53, skipping insertion in model container [2022-07-11 21:58:53,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:53,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 21:58:53,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 21:58:53,958 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/array-examples/standard_sentinel-2.i[852,865] [2022-07-11 21:58:53,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:58:53,970 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 21:58:53,977 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/array-examples/standard_sentinel-2.i[852,865] [2022-07-11 21:58:53,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:58:53,988 INFO L208 MainTranslator]: Completed translation [2022-07-11 21:58:53,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53 WrapperNode [2022-07-11 21:58:53,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 21:58:53,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 21:58:53,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 21:58:53,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 21:58:53,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:53,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,011 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-07-11 21:58:54,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 21:58:54,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 21:58:54,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 21:58:54,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 21:58:54,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 21:58:54,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 21:58:54,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 21:58:54,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 21:58:54,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (1/1) ... [2022-07-11 21:58:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:58:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:58:54,060 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) [2022-07-11 21:58:54,067 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 [2022-07-11 21:58:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 21:58:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 21:58:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 21:58:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 21:58:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 21:58:54,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 21:58:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 21:58:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 21:58:54,125 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 21:58:54,126 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 21:58:54,228 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 21:58:54,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 21:58:54,243 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 21:58:54,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:58:54 BoogieIcfgContainer [2022-07-11 21:58:54,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 21:58:54,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 21:58:54,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 21:58:54,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 21:58:54,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 09:58:53" (1/3) ... [2022-07-11 21:58:54,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b46ebfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:58:54, skipping insertion in model container [2022-07-11 21:58:54,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:58:53" (2/3) ... [2022-07-11 21:58:54,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b46ebfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:58:54, skipping insertion in model container [2022-07-11 21:58:54,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:58:54" (3/3) ... [2022-07-11 21:58:54,252 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2022-07-11 21:58:54,261 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 21:58:54,265 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 21:58:54,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 21:58:54,307 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@2fba0cc4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@739b2df7 [2022-07-11 21:58:54,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 21:58:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-11 21:58:54,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:54,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:54,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:54,326 INFO L85 PathProgramCache]: Analyzing trace with hash 214135089, now seen corresponding path program 1 times [2022-07-11 21:58:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:54,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686383071] [2022-07-11 21:58:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:54,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:58:54,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:54,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686383071] [2022-07-11 21:58:54,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686383071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:58:54,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 21:58:54,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 21:58:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371954334] [2022-07-11 21:58:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:58:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 21:58:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:58:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 21:58:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:58:54,506 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:58:54,538 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-07-11 21:58:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 21:58:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-11 21:58:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:58:54,545 INFO L225 Difference]: With dead ends: 30 [2022-07-11 21:58:54,545 INFO L226 Difference]: Without dead ends: 13 [2022-07-11 21:58:54,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:58:54,550 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:58:54,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:58:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-11 21:58:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-07-11 21:58:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-11 21:58:54,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-07-11 21:58:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:58:54,610 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-11 21:58:54,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-11 21:58:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 21:58:54,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:54,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 21:58:54,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1622702096, now seen corresponding path program 1 times [2022-07-11 21:58:54,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:54,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676050221] [2022-07-11 21:58:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:54,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:58:54,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:54,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676050221] [2022-07-11 21:58:54,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676050221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:58:54,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106809140] [2022-07-11 21:58:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:54,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:58:54,722 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) [2022-07-11 21:58:54,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 21:58:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 21:58:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:58:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:58:54,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:58:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:58:54,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106809140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:58:54,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:58:54,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 21:58:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154806871] [2022-07-11 21:58:54,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:58:54,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 21:58:54,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:58:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 21:58:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 21:58:54,842 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:58:54,861 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-07-11 21:58:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 21:58:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 21:58:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:58:54,862 INFO L225 Difference]: With dead ends: 25 [2022-07-11 21:58:54,862 INFO L226 Difference]: Without dead ends: 18 [2022-07-11 21:58:54,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 21:58:54,864 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:58:54,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:58:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-11 21:58:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-11 21:58:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-11 21:58:54,867 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2022-07-11 21:58:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:58:54,868 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-11 21:58:54,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-11 21:58:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-11 21:58:54,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:54,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:54,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 21:58:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:55,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash 49509066, now seen corresponding path program 2 times [2022-07-11 21:58:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:55,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390105113] [2022-07-11 21:58:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:55,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 21:58:55,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390105113] [2022-07-11 21:58:55,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390105113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:58:55,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 21:58:55,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 21:58:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956150834] [2022-07-11 21:58:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:58:55,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 21:58:55,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:58:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 21:58:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 21:58:55,209 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:58:55,223 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-07-11 21:58:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 21:58:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-11 21:58:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:58:55,224 INFO L225 Difference]: With dead ends: 24 [2022-07-11 21:58:55,225 INFO L226 Difference]: Without dead ends: 20 [2022-07-11 21:58:55,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 21:58:55,228 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:58:55,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:58:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-11 21:58:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-11 21:58:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-11 21:58:55,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-07-11 21:58:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:58:55,235 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-11 21:58:55,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-11 21:58:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 21:58:55,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:55,237 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:55,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 21:58:55,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 382246981, now seen corresponding path program 1 times [2022-07-11 21:58:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:55,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899607171] [2022-07-11 21:58:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 21:58:55,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899607171] [2022-07-11 21:58:55,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899607171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:58:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95711437] [2022-07-11 21:58:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:58:55,348 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) [2022-07-11 21:58:55,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 21:58:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 21:58:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:58:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 21:58:55,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:58:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 21:58:55,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95711437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:58:55,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:58:55,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-11 21:58:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198933603] [2022-07-11 21:58:55,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:58:55,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 21:58:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:58:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 21:58:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 21:58:55,476 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:58:55,502 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-11 21:58:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 21:58:55,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-11 21:58:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:58:55,504 INFO L225 Difference]: With dead ends: 41 [2022-07-11 21:58:55,504 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 21:58:55,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 21:58:55,505 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:58:55,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:58:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 21:58:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-11 21:58:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-11 21:58:55,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2022-07-11 21:58:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:58:55,509 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-11 21:58:55,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-11 21:58:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 21:58:55,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:55,510 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:55,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 21:58:55,730 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,SelfDestructingSolverStorable3 [2022-07-11 21:58:55,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:55,731 INFO L85 PathProgramCache]: Analyzing trace with hash 822799929, now seen corresponding path program 2 times [2022-07-11 21:58:55,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:55,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594275446] [2022-07-11 21:58:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:55,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 21:58:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594275446] [2022-07-11 21:58:55,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594275446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:58:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509807236] [2022-07-11 21:58:55,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:58:55,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:55,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:58:55,920 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) [2022-07-11 21:58:55,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 21:58:55,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 21:58:55,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:58:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 21:58:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:58:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 21:58:56,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:58:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 21:58:56,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509807236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:58:56,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:58:56,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-11 21:58:56,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677301479] [2022-07-11 21:58:56,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:58:56,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 21:58:56,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:58:56,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 21:58:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 21:58:56,243 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:58:56,296 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-07-11 21:58:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 21:58:56,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-11 21:58:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:58:56,298 INFO L225 Difference]: With dead ends: 65 [2022-07-11 21:58:56,298 INFO L226 Difference]: Without dead ends: 56 [2022-07-11 21:58:56,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 21:58:56,299 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:58:56,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:58:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-11 21:58:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-11 21:58:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-07-11 21:58:56,304 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2022-07-11 21:58:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:58:56,304 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-07-11 21:58:56,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-07-11 21:58:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 21:58:56,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:56,306 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:56,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 21:58:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:56,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash 798531617, now seen corresponding path program 3 times [2022-07-11 21:58:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:56,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742805734] [2022-07-11 21:58:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 21:58:56,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742805734] [2022-07-11 21:58:56,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742805734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:58:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751240505] [2022-07-11 21:58:56,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 21:58:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:58:56,826 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) [2022-07-11 21:58:56,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 21:58:56,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-11 21:58:56,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:58:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 21:58:56,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:58:56,906 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 15 treesize of output 11 [2022-07-11 21:58:56,934 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 21:58:56,934 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 23 treesize of output 23 [2022-07-11 21:58:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-11 21:58:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:58:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-11 21:58:57,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751240505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:58:57,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:58:57,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2022-07-11 21:58:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237219748] [2022-07-11 21:58:57,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:58:57,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 21:58:57,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:58:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 21:58:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2022-07-11 21:58:57,143 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:58:57,254 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-07-11 21:58:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 21:58:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-11 21:58:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:58:57,255 INFO L225 Difference]: With dead ends: 72 [2022-07-11 21:58:57,255 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 21:58:57,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 21:58:57,256 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:58:57,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 45 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-07-11 21:58:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 21:58:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-07-11 21:58:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-11 21:58:57,261 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2022-07-11 21:58:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:58:57,261 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-11 21:58:57,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-11 21:58:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 21:58:57,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:57,262 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:57,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 21:58:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:57,478 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -978301670, now seen corresponding path program 4 times [2022-07-11 21:58:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:57,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397910908] [2022-07-11 21:58:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 21:58:57,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397910908] [2022-07-11 21:58:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397910908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:58:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385709416] [2022-07-11 21:58:57,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 21:58:57,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:57,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:58:57,756 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) [2022-07-11 21:58:57,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 21:58:57,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 21:58:57,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:58:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 21:58:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:58:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 21:58:57,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:58:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 21:58:58,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385709416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:58:58,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:58:58,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-07-11 21:58:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874192513] [2022-07-11 21:58:58,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:58:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-11 21:58:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:58:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-11 21:58:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 21:58:58,495 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:58:58,608 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-07-11 21:58:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-11 21:58:58,608 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-11 21:58:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:58:58,609 INFO L225 Difference]: With dead ends: 121 [2022-07-11 21:58:58,609 INFO L226 Difference]: Without dead ends: 110 [2022-07-11 21:58:58,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 21:58:58,610 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:58:58,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 34 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:58:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-11 21:58:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-11 21:58:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-11 21:58:58,617 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 59 [2022-07-11 21:58:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:58:58,618 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-11 21:58:58,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:58:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-11 21:58:58,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-11 21:58:58,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:58:58,619 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:58:58,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 21:58:58,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:58,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:58:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:58:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1840451240, now seen corresponding path program 5 times [2022-07-11 21:58:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:58:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901434389] [2022-07-11 21:58:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:58:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:58:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:58:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 21:58:59,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:58:59,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901434389] [2022-07-11 21:58:59,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901434389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:58:59,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438558315] [2022-07-11 21:58:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 21:58:59,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:58:59,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:58:59,836 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) [2022-07-11 21:58:59,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 21:59:16,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-07-11 21:59:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:59:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-11 21:59:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:59:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 21:59:16,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:59:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 21:59:18,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438558315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:59:18,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:59:18,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-07-11 21:59:18,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551570847] [2022-07-11 21:59:18,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:59:18,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-11 21:59:18,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:59:18,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-11 21:59:18,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-11 21:59:18,317 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:59:18,548 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2022-07-11 21:59:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-11 21:59:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-11 21:59:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:59:18,550 INFO L225 Difference]: With dead ends: 221 [2022-07-11 21:59:18,550 INFO L226 Difference]: Without dead ends: 210 [2022-07-11 21:59:18,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-11 21:59:18,552 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 21:59:18,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 42 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 21:59:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-11 21:59:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-07-11 21:59:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-07-11 21:59:18,578 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 109 [2022-07-11 21:59:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:59:18,578 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-07-11 21:59:18,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-07-11 21:59:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-11 21:59:18,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:59:18,580 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:59:18,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 21:59:18,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:59:18,804 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:59:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:59:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -788516028, now seen corresponding path program 6 times [2022-07-11 21:59:18,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:59:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859404537] [2022-07-11 21:59:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:59:18,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:59:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:59:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 21:59:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:59:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859404537] [2022-07-11 21:59:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859404537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:59:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046979931] [2022-07-11 21:59:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 21:59:21,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:59:21,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:59:21,366 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) [2022-07-11 21:59:21,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 21:59:21,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 21:59:21,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:59:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 21:59:21,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:59:21,487 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 15 treesize of output 11 [2022-07-11 21:59:21,668 INFO L356 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-07-11 21:59:21,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2022-07-11 21:59:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-07-11 21:59:21,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:59:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-07-11 21:59:22,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046979931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:59:22,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:59:22,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 8, 8] total 112 [2022-07-11 21:59:22,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816769963] [2022-07-11 21:59:22,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:59:22,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-11 21:59:22,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:59:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-11 21:59:22,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5093, Invalid=7339, Unknown=0, NotChecked=0, Total=12432 [2022-07-11 21:59:22,267 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 112 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:59:22,778 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-07-11 21:59:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-07-11 21:59:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 112 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-07-11 21:59:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:59:22,788 INFO L225 Difference]: With dead ends: 232 [2022-07-11 21:59:22,788 INFO L226 Difference]: Without dead ends: 217 [2022-07-11 21:59:22,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 406 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5127, Invalid=8445, Unknown=0, NotChecked=0, Total=13572 [2022-07-11 21:59:22,793 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 21:59:22,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 49 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 271 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-07-11 21:59:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-11 21:59:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-07-11 21:59:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-07-11 21:59:22,815 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 209 [2022-07-11 21:59:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:59:22,816 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-07-11 21:59:22,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 112 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-07-11 21:59:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-11 21:59:22,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:59:22,818 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:59:22,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 21:59:23,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:59:23,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:59:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:59:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1692188344, now seen corresponding path program 7 times [2022-07-11 21:59:23,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:59:23,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069553987] [2022-07-11 21:59:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:59:23,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:59:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:59:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 21:59:25,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:59:25,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069553987] [2022-07-11 21:59:25,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069553987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:59:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055477527] [2022-07-11 21:59:25,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 21:59:25,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:59:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:59:25,642 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) [2022-07-11 21:59:25,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 21:59:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:59:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-11 21:59:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:59:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 21:59:26,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:59:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 21:59:33,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055477527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:59:33,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:59:33,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2022-07-11 21:59:33,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053052292] [2022-07-11 21:59:33,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:59:33,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-07-11 21:59:33,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:59:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-07-11 21:59:33,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-11 21:59:33,703 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:59:34,400 INFO L93 Difference]: Finished difference Result 433 states and 535 transitions. [2022-07-11 21:59:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-11 21:59:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-07-11 21:59:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:59:34,403 INFO L225 Difference]: With dead ends: 433 [2022-07-11 21:59:34,403 INFO L226 Difference]: Without dead ends: 418 [2022-07-11 21:59:34,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-11 21:59:34,406 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 21:59:34,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 50 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 21:59:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-11 21:59:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-07-11 21:59:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0047961630695443) internal successors, (419), 417 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 419 transitions. [2022-07-11 21:59:34,415 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 419 transitions. Word has length 215 [2022-07-11 21:59:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:59:34,415 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 419 transitions. [2022-07-11 21:59:34,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:59:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 419 transitions. [2022-07-11 21:59:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-07-11 21:59:34,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:59:34,419 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:59:34,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-11 21:59:34,627 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,SelfDestructingSolverStorable9 [2022-07-11 21:59:34,628 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:59:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:59:34,629 INFO L85 PathProgramCache]: Analyzing trace with hash 995929774, now seen corresponding path program 8 times [2022-07-11 21:59:34,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:59:34,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125365747] [2022-07-11 21:59:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:59:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:59:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:59:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 21:59:43,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:59:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125365747] [2022-07-11 21:59:43,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125365747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:59:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151218683] [2022-07-11 21:59:43,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:59:43,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:59:43,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:59:43,520 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) [2022-07-11 21:59:43,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 21:59:43,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 21:59:43,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:59:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 202 conjunts are in the unsatisfiable core [2022-07-11 21:59:43,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:59:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 21:59:44,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:00:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:00:08,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151218683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:00:08,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:00:08,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2022-07-11 22:00:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901372501] [2022-07-11 22:00:08,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:00:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-07-11 22:00:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:00:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-07-11 22:00:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-07-11 22:00:08,234 INFO L87 Difference]: Start difference. First operand 418 states and 419 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:00:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:00:11,088 INFO L93 Difference]: Finished difference Result 837 states and 1040 transitions. [2022-07-11 22:00:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-07-11 22:00:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 417 [2022-07-11 22:00:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:00:11,092 INFO L225 Difference]: With dead ends: 837 [2022-07-11 22:00:11,092 INFO L226 Difference]: Without dead ends: 822 [2022-07-11 22:00:11,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-07-11 22:00:11,100 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 603 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 22:00:11,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 42 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 22:00:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-07-11 22:00:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2022-07-11 22:00:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.002436053593179) internal successors, (823), 821 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:00:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 823 transitions. [2022-07-11 22:00:11,115 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 823 transitions. Word has length 417 [2022-07-11 22:00:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:00:11,116 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 823 transitions. [2022-07-11 22:00:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:00:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 823 transitions. [2022-07-11 22:00:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-07-11 22:00:11,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:00:11,130 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:00:11,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:00:11,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:00:11,350 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:00:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:00:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash -616313830, now seen corresponding path program 9 times [2022-07-11 22:00:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:00:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276123264] [2022-07-11 22:00:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:00:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:00:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:00:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:00:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:00:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276123264] [2022-07-11 22:00:49,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276123264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:00:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142721142] [2022-07-11 22:00:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:00:49,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:00:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:00:49,989 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) [2022-07-11 22:00:49,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:00:50,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 22:00:50,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:00:50,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 22:00:50,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:00:50,350 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 15 treesize of output 11 [2022-07-11 22:00:51,956 INFO L356 Elim1Store]: treesize reduction 106, result has 24.8 percent of original size [2022-07-11 22:00:51,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 53 [2022-07-11 22:00:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-07-11 22:00:52,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:00:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-07-11 22:00:53,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142721142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:00:53,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:00:53,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 12, 12] total 424 [2022-07-11 22:00:53,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758818987] [2022-07-11 22:00:53,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:00:53,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 424 states [2022-07-11 22:00:53,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:00:54,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 424 interpolants. [2022-07-11 22:00:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81901, Invalid=97451, Unknown=0, NotChecked=0, Total=179352 [2022-07-11 22:00:54,012 INFO L87 Difference]: Start difference. First operand 822 states and 823 transitions. Second operand has 424 states, 424 states have (on average 1.9882075471698113) internal successors, (843), 424 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:00,080 INFO L93 Difference]: Finished difference Result 860 states and 867 transitions. [2022-07-11 22:01:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-07-11 22:01:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 424 states, 424 states have (on average 1.9882075471698113) internal successors, (843), 424 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 821 [2022-07-11 22:01:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:00,084 INFO L225 Difference]: With dead ends: 860 [2022-07-11 22:01:00,084 INFO L226 Difference]: Without dead ends: 835 [2022-07-11 22:01:00,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2059 GetRequests, 1622 SyntacticMatches, 1 SemanticMatches, 436 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8270 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=82079, Invalid=109327, Unknown=0, NotChecked=0, Total=191406 [2022-07-11 22:01:00,092 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 436 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:00,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 70 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 22:01:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-07-11 22:01:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 834. [2022-07-11 22:01:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 1.0024009603841537) internal successors, (835), 833 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 835 transitions. [2022-07-11 22:01:00,108 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 835 transitions. Word has length 821 [2022-07-11 22:01:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:00,108 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 835 transitions. [2022-07-11 22:01:00,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 424 states, 424 states have (on average 1.9882075471698113) internal successors, (843), 424 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 835 transitions. [2022-07-11 22:01:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2022-07-11 22:01:00,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:00,114 INFO L195 NwaCegarLoop]: trace histogram [403, 403, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:00,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:01:00,327 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,SelfDestructingSolverStorable11 [2022-07-11 22:01:00,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1957266111, now seen corresponding path program 10 times [2022-07-11 22:01:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458886497] [2022-07-11 22:01:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:00,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 162499 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-11 22:01:37,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458886497] [2022-07-11 22:01:37,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458886497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:01:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458307514] [2022-07-11 22:01:37,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:01:37,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:37,355 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) [2022-07-11 22:01:37,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:01:38,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:01:38,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:01:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 3731 conjuncts, 405 conjunts are in the unsatisfiable core [2022-07-11 22:01:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:01:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 162499 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-11 22:01:38,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:03:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 162499 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-11 22:03:22,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458307514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:03:22,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:03:22,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 406, 406] total 811 [2022-07-11 22:03:22,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19725124] [2022-07-11 22:03:22,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:03:22,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-07-11 22:03:22,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:03:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-07-11 22:03:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328455, Invalid=328455, Unknown=0, NotChecked=0, Total=656910 [2022-07-11 22:03:22,804 INFO L87 Difference]: Start difference. First operand 834 states and 835 transitions. Second operand has 811 states, 811 states have (on average 2.0061652281134403) internal successors, (1627), 811 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)