./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep10-2.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 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:03:59,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:03:59,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:04:00,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:04:00,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:04:00,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:04:00,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:04:00,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:04:00,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:04:00,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:04:00,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:04:00,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:04:00,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:04:00,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:04:00,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:04:00,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:04:00,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:04:00,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:04:00,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:04:00,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:04:00,070 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:04:00,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:04:00,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:04:00,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:04:00,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:04:00,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:04:00,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:04:00,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:04:00,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:04:00,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:04:00,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:04:00,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:04:00,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:04:00,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:04:00,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:04:00,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:04:00,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:04:00,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:04:00,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:04:00,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:04:00,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:04:00,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:04:00,087 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:04:00,119 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:04:00,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:04:00,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:04:00,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:04:00,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:04:00,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:04:00,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:04:00,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:04:00,121 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:04:00,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:04:00,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:04:00,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:04:00,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:04:00,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:04:00,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:04:00,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:04:00,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:04:00,123 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:04:00,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:04:00,124 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:04:00,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:04:00,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:04:00,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:04:00,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:04:00,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:04:00,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:04:00,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:04:00,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:04:00,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:04:00,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:04:00,127 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:04:00,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:04:00,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:04:00,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 [2022-07-20 21:04:00,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:04:00,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:04:00,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:04:00,334 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:04:00,335 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:04:00,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-07-20 21:04:00,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9157fbbe2/10869c74003545e39a1b9bcd1d790c7b/FLAG03b410ac4 [2022-07-20 21:04:00,748 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:04:00,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-07-20 21:04:00,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9157fbbe2/10869c74003545e39a1b9bcd1d790c7b/FLAG03b410ac4 [2022-07-20 21:04:00,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9157fbbe2/10869c74003545e39a1b9bcd1d790c7b [2022-07-20 21:04:00,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:04:00,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:04:00,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:04:00,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:04:00,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:04:00,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:00,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e08ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00, skipping insertion in model container [2022-07-20 21:04:00,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:00,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:04:00,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:04:00,908 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i[1293,1306] [2022-07-20 21:04:00,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:04:00,915 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:04:00,927 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i[1293,1306] [2022-07-20 21:04:00,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:04:00,936 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:04:00,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00 WrapperNode [2022-07-20 21:04:00,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:04:00,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:04:00,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:04:00,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:04:00,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:00,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:00,980 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-20 21:04:00,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:04:00,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:04:00,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:04:00,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:04:00,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:00,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:00,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:00,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:01,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:01,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:01,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:01,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:04:01,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:04:01,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:04:01,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:04:01,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (1/1) ... [2022-07-20 21:04:01,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:04:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:01,060 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) [2022-07-20 21:04:01,078 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 [2022-07-20 21:04:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:04:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:04:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:04:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:04:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:04:01,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:04:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:04:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:04:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-20 21:04:01,091 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-20 21:04:01,162 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:04:01,163 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:04:01,267 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:04:01,272 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:04:01,273 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:04:01,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:04:01 BoogieIcfgContainer [2022-07-20 21:04:01,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:04:01,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:04:01,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:04:01,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:04:01,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:04:00" (1/3) ... [2022-07-20 21:04:01,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb45733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:04:01, skipping insertion in model container [2022-07-20 21:04:01,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:00" (2/3) ... [2022-07-20 21:04:01,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb45733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:04:01, skipping insertion in model container [2022-07-20 21:04:01,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:04:01" (3/3) ... [2022-07-20 21:04:01,282 INFO L111 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2022-07-20 21:04:01,292 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:04:01,292 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:04:01,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:04:01,329 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@4d695bce, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5172b235 [2022-07-20 21:04:01,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:04:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:04:01,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:01,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:01,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-07-20 21:04:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:01,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8056076] [2022-07-20 21:04:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:01,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:04:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:04:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:04:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:04:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8056076] [2022-07-20 21:04:01,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8056076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:04:01,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:04:01,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:04:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230236157] [2022-07-20 21:04:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:04:01,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:04:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:04:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:04:01,594 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:04:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:01,633 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-07-20 21:04:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:04:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-20 21:04:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:01,644 INFO L225 Difference]: With dead ends: 52 [2022-07-20 21:04:01,644 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:04:01,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:04:01,652 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 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 [2022-07-20 21:04:01,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:04:01,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-20 21:04:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-20 21:04:01,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-20 21:04:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:01,696 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-20 21:04:01,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:04:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-20 21:04:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 21:04:01,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:01,700 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:01,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:04:01,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-07-20 21:04:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195490773] [2022-07-20 21:04:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:01,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:04:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 21:04:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:04:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:04:01,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:01,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195490773] [2022-07-20 21:04:01,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195490773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:01,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016862324] [2022-07-20 21:04:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:01,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:01,835 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) [2022-07-20 21:04:01,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:04:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:01,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:04:01,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:04:01,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:04:01,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016862324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:04:01,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:04:01,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-20 21:04:01,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91263120] [2022-07-20 21:04:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:04:01,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:04:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:04:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:04:01,934 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:01,955 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-20 21:04:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:04:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-20 21:04:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:01,957 INFO L225 Difference]: With dead ends: 45 [2022-07-20 21:04:01,957 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:04:01,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:04:01,959 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 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 [2022-07-20 21:04:01,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:04:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-20 21:04:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-20 21:04:01,970 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-07-20 21:04:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:01,970 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-20 21:04:01,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-20 21:04:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:04:01,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:01,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:01,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:04:02,190 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 [2022-07-20 21:04:02,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-07-20 21:04:02,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:02,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803181299] [2022-07-20 21:04:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:02,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:04:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:04:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:04:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:04:02,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:02,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803181299] [2022-07-20 21:04:02,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803181299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:02,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209589173] [2022-07-20 21:04:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:02,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:02,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:02,285 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) [2022-07-20 21:04:02,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:04:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:04:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:04:02,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:04:02,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209589173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:04:02,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:04:02,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 21:04:02,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405091220] [2022-07-20 21:04:02,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:04:02,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:04:02,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:04:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:04:02,349 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:02,356 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-20 21:04:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:04:02,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-20 21:04:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:02,358 INFO L225 Difference]: With dead ends: 41 [2022-07-20 21:04:02,358 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:04:02,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:04:02,359 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:02,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:04:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-20 21:04:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-20 21:04:02,362 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-07-20 21:04:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:02,363 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-20 21:04:02,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-20 21:04:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 21:04:02,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:02,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:02,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:02,581 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,SelfDestructingSolverStorable2 [2022-07-20 21:04:02,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-07-20 21:04:02,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:02,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295833668] [2022-07-20 21:04:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:02,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:04:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:04:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-20 21:04:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:04:02,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295833668] [2022-07-20 21:04:02,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295833668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507795570] [2022-07-20 21:04:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:02,683 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) [2022-07-20 21:04:02,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:04:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:04:02,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:04:02,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:04:02,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507795570] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:02,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:02,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-20 21:04:02,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533461484] [2022-07-20 21:04:02,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:02,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:04:02,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:04:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:04:02,804 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:04:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:02,832 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-20 21:04:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:04:02,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-20 21:04:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:02,833 INFO L225 Difference]: With dead ends: 58 [2022-07-20 21:04:02,833 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 21:04:02,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:04:02,834 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:02,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 21:04:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-20 21:04:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-20 21:04:02,838 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-07-20 21:04:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:02,838 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-20 21:04:02,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:04:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-20 21:04:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:04:02,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:02,841 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:02,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:03,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:03,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-07-20 21:04:03,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92547105] [2022-07-20 21:04:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 21:04:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-20 21:04:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:04:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-20 21:04:03,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92547105] [2022-07-20 21:04:03,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92547105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783114487] [2022-07-20 21:04:03,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:04:03,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:03,153 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) [2022-07-20 21:04:03,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:04:03,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:04:03,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:04:03,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-20 21:04:03,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-20 21:04:03,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783114487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:03,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:03,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-20 21:04:03,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086882250] [2022-07-20 21:04:03,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:03,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:04:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:04:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:04:03,324 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:04:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:03,362 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-07-20 21:04:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:04:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-07-20 21:04:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:03,363 INFO L225 Difference]: With dead ends: 74 [2022-07-20 21:04:03,363 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 21:04:03,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:04:03,364 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:03,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 21:04:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-20 21:04:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-20 21:04:03,369 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-07-20 21:04:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:03,369 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-20 21:04:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:04:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-20 21:04:03,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 21:04:03,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:03,384 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:03,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:03,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:03,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:03,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-07-20 21:04:03,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:03,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51683106] [2022-07-20 21:04:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:03,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-20 21:04:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:04:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-20 21:04:03,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:03,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51683106] [2022-07-20 21:04:03,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51683106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:03,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352522146] [2022-07-20 21:04:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:04:03,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:03,723 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) [2022-07-20 21:04:03,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:04:03,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:04:03,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:03,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:04:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-20 21:04:03,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-20 21:04:03,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352522146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:03,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:03,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-20 21:04:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163034577] [2022-07-20 21:04:03,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:03,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:04:03,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:04:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:04:03,849 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:04:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:03,866 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2022-07-20 21:04:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:04:03,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-07-20 21:04:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:03,867 INFO L225 Difference]: With dead ends: 86 [2022-07-20 21:04:03,867 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 21:04:03,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:04:03,868 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:03,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 21:04:03,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-20 21:04:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-20 21:04:03,882 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 70 [2022-07-20 21:04:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:03,882 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-20 21:04:03,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:04:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-20 21:04:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 21:04:03,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:03,887 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:03,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:04,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash -189786485, now seen corresponding path program 4 times [2022-07-20 21:04:04,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:04,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806236620] [2022-07-20 21:04:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:04,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-20 21:04:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:04:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-20 21:04:04,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:04,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806236620] [2022-07-20 21:04:04,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806236620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:04,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400589042] [2022-07-20 21:04:04,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:04:04,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:04,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:04,212 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) [2022-07-20 21:04:04,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:04:04,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:04:04,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:04,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:04:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-07-20 21:04:04,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-20 21:04:04,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400589042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:04,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:04,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-20 21:04:04,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74518006] [2022-07-20 21:04:04,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:04,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:04:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:04,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:04:04,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:04:04,399 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:04:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:04,443 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2022-07-20 21:04:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:04:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 106 [2022-07-20 21:04:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:04,445 INFO L225 Difference]: With dead ends: 110 [2022-07-20 21:04:04,445 INFO L226 Difference]: Without dead ends: 73 [2022-07-20 21:04:04,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:04:04,446 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:04,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-20 21:04:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-20 21:04:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-07-20 21:04:04,456 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 106 [2022-07-20 21:04:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:04,457 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-07-20 21:04:04,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:04:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-07-20 21:04:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 21:04:04,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:04,465 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:04,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:04,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:04,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1263048203, now seen corresponding path program 5 times [2022-07-20 21:04:04,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:04,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698938231] [2022-07-20 21:04:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:04,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-20 21:04:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:04:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-20 21:04:04,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698938231] [2022-07-20 21:04:04,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698938231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279801254] [2022-07-20 21:04:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:04:04,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:04,804 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) [2022-07-20 21:04:04,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:04:05,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-20 21:04:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:05,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:04:05,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 650 proven. 4 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2022-07-20 21:04:05,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-20 21:04:05,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279801254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:05,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:05,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-20 21:04:05,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333731498] [2022-07-20 21:04:05,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:05,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:04:05,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:04:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:04:05,222 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:05,241 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2022-07-20 21:04:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:04:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2022-07-20 21:04:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:05,244 INFO L225 Difference]: With dead ends: 122 [2022-07-20 21:04:05,244 INFO L226 Difference]: Without dead ends: 81 [2022-07-20 21:04:05,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:04:05,245 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:05,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-20 21:04:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-20 21:04:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-07-20 21:04:05,255 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 142 [2022-07-20 21:04:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:05,255 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-07-20 21:04:05,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-07-20 21:04:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-20 21:04:05,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:05,257 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:05,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:05,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -660788349, now seen corresponding path program 6 times [2022-07-20 21:04:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:05,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083831074] [2022-07-20 21:04:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:05,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:05,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:05,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-20 21:04:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:04:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-20 21:04:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:05,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083831074] [2022-07-20 21:04:05,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083831074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:05,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546771772] [2022-07-20 21:04:05,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:04:05,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:05,625 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) [2022-07-20 21:04:05,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:04:06,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-20 21:04:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:04:06,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2022-07-20 21:04:06,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-20 21:04:06,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546771772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:06,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:06,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-20 21:04:06,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393814027] [2022-07-20 21:04:06,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:04:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:04:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:04:06,093 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:06,124 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-07-20 21:04:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:04:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2022-07-20 21:04:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:06,126 INFO L225 Difference]: With dead ends: 128 [2022-07-20 21:04:06,126 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 21:04:06,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:04:06,127 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:06,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:06,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 21:04:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-20 21:04:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 82 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2022-07-20 21:04:06,132 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 150 [2022-07-20 21:04:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:06,133 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2022-07-20 21:04:06,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2022-07-20 21:04:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 21:04:06,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:06,134 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:06,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:06,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 21:04:06,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1766594339, now seen corresponding path program 7 times [2022-07-20 21:04:06,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:06,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197430806] [2022-07-20 21:04:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:06,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:06,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:07,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-20 21:04:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:07,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-20 21:04:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-07-20 21:04:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197430806] [2022-07-20 21:04:07,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197430806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:07,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906613934] [2022-07-20 21:04:07,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:04:07,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:07,388 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) [2022-07-20 21:04:07,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:04:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:07,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-20 21:04:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-07-20 21:04:08,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-20 21:04:08,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906613934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:08,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:08,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 38 [2022-07-20 21:04:08,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767681086] [2022-07-20 21:04:08,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:09,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:04:09,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:04:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:04:09,010 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-20 21:04:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:09,578 INFO L93 Difference]: Finished difference Result 293 states and 410 transitions. [2022-07-20 21:04:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:04:09,579 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 156 [2022-07-20 21:04:09,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:09,584 INFO L225 Difference]: With dead ends: 293 [2022-07-20 21:04:09,584 INFO L226 Difference]: Without dead ends: 289 [2022-07-20 21:04:09,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 307 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:04:09,585 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 65 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:09,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 3257 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:04:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-20 21:04:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 229. [2022-07-20 21:04:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 221 states have (on average 1.2714932126696832) internal successors, (281), 222 states have internal predecessors, (281), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 21:04:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2022-07-20 21:04:09,618 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 156 [2022-07-20 21:04:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:09,619 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2022-07-20 21:04:09,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-20 21:04:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2022-07-20 21:04:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 21:04:09,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:09,621 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:09,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:09,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:04:09,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1086535969, now seen corresponding path program 1 times [2022-07-20 21:04:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:09,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121288509] [2022-07-20 21:04:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:09,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:10,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-20 21:04:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:10,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-20 21:04:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 648 proven. 621 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-07-20 21:04:10,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:10,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121288509] [2022-07-20 21:04:10,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121288509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:10,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620732922] [2022-07-20 21:04:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:10,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:10,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:10,997 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) [2022-07-20 21:04:10,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:04:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 21:04:11,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:11,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-20 21:04:11,361 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 17 treesize of output 13 [2022-07-20 21:04:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2022-07-20 21:04:12,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:13,137 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-20 21:04:13,137 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 34 treesize of output 29 [2022-07-20 21:04:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 676 proven. 460 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-20 21:04:13,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620732922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:13,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:13,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 20] total 62 [2022-07-20 21:04:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327785956] [2022-07-20 21:04:13,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:13,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 21:04:13,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 21:04:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3557, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 21:04:13,192 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 21:04:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:15,195 INFO L93 Difference]: Finished difference Result 526 states and 716 transitions. [2022-07-20 21:04:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-20 21:04:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 156 [2022-07-20 21:04:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:15,198 INFO L225 Difference]: With dead ends: 526 [2022-07-20 21:04:15,198 INFO L226 Difference]: Without dead ends: 474 [2022-07-20 21:04:15,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 319 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=560, Invalid=7996, Unknown=0, NotChecked=0, Total=8556 [2022-07-20 21:04:15,201 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 239 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 864 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:15,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1446 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1959 Invalid, 0 Unknown, 864 Unchecked, 1.0s Time] [2022-07-20 21:04:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-20 21:04:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 443. [2022-07-20 21:04:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 430 states have (on average 1.3093023255813954) internal successors, (563), 434 states have internal predecessors, (563), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-07-20 21:04:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 598 transitions. [2022-07-20 21:04:15,234 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 598 transitions. Word has length 156 [2022-07-20 21:04:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:15,235 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 598 transitions. [2022-07-20 21:04:15,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 21:04:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 598 transitions. [2022-07-20 21:04:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 21:04:15,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:15,238 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:15,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:15,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:04:15,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1508428901, now seen corresponding path program 2 times [2022-07-20 21:04:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:15,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969927188] [2022-07-20 21:04:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:15,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-20 21:04:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-20 21:04:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1092 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-20 21:04:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969927188] [2022-07-20 21:04:16,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969927188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768793885] [2022-07-20 21:04:16,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:04:16,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:16,963 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) [2022-07-20 21:04:16,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:04:17,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:04:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-20 21:04:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:17,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-07-20 21:04:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:04:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-20 21:04:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:04:17,953 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:04:17,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-07-20 21:04:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 27 proven. 1416 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-20 21:04:18,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:43,109 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-20 21:04:43,109 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 38 treesize of output 31 [2022-07-20 21:04:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 367 proven. 974 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-20 21:04:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768793885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:43,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:43,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 49, 44] total 96 [2022-07-20 21:04:43,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251050697] [2022-07-20 21:04:43,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:43,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-20 21:04:43,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-20 21:04:43,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=8682, Unknown=30, NotChecked=0, Total=9120 [2022-07-20 21:04:43,685 INFO L87 Difference]: Start difference. First operand 443 states and 598 transitions. Second operand has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:04:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:46,664 INFO L93 Difference]: Finished difference Result 1180 states and 1633 transitions. [2022-07-20 21:04:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-20 21:04:46,665 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 156 [2022-07-20 21:04:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:46,670 INFO L225 Difference]: With dead ends: 1180 [2022-07-20 21:04:46,670 INFO L226 Difference]: Without dead ends: 1089 [2022-07-20 21:04:46,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 279 SyntacticMatches, 18 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=791, Invalid=14929, Unknown=30, NotChecked=0, Total=15750 [2022-07-20 21:04:46,675 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 159 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 2793 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 5257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2419 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:46,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 3406 Invalid, 5257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2793 Invalid, 0 Unknown, 2419 Unchecked, 1.3s Time] [2022-07-20 21:04:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-20 21:04:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1038. [2022-07-20 21:04:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1011 states have (on average 1.3194856577645895) internal successors, (1334), 1021 states have internal predecessors, (1334), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (93), 11 states have call predecessors, (93), 11 states have call successors, (93) [2022-07-20 21:04:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1438 transitions. [2022-07-20 21:04:46,739 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1438 transitions. Word has length 156 [2022-07-20 21:04:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:46,740 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1438 transitions. [2022-07-20 21:04:46,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:04:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1438 transitions. [2022-07-20 21:04:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 21:04:46,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:46,745 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:46,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:46,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 21:04:46,963 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1248509279, now seen corresponding path program 3 times [2022-07-20 21:04:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778644645] [2022-07-20 21:04:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:46,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:48,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-20 21:04:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:48,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-20 21:04:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1094 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-20 21:04:48,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778644645] [2022-07-20 21:04:48,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778644645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096734901] [2022-07-20 21:04:48,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:04:48,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:48,492 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:04:48,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:04:49,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-20 21:04:49,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:49,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 21:04:49,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:49,744 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:04:49,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-20 21:04:49,802 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:04:49,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-20 21:04:49,875 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:04:49,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-20 21:04:49,932 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:04:49,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-20 21:04:49,993 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:04:49,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-20 21:04:50,020 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:04:50,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-07-20 21:04:50,125 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:04:50,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2022-07-20 21:04:50,253 INFO L356 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-07-20 21:04:50,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 63 [2022-07-20 21:04:50,437 INFO L356 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2022-07-20 21:04:50,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 83 [2022-07-20 21:04:50,771 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:04:50,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 856 proven. 346 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-07-20 21:05:20,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:24,946 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_85| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |c_ULTIMATE.start_main_~i~2#1| 1))) (forall ((v_ArrVal_758 Int)) (<= 0 (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ .cse0 (* 2 (div (* (- 1) .cse0) 2)))))))) is different from false [2022-07-20 21:05:40,528 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_86| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~2#1_85| Int) (v_ArrVal_758 Int) (v_ArrVal_756 Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |v_ULTIMATE.start_main_~i~2#1_86| 1))) (<= 0 (let ((.cse0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_86| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_756) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ (* 2 (div (* (- 1) .cse0) 2)) .cse0))))) (not (<= |v_ULTIMATE.start_main_~i~2#1_86| (+ |c_ULTIMATE.start_main_~i~2#1| 1))))) is different from false [2022-07-20 21:07:01,919 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_87| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_87| (+ |c_ULTIMATE.start_main_~i~2#1| 1))) (forall ((|v_ULTIMATE.start_main_~i~2#1_85| Int) (|v_ULTIMATE.start_main_~i~2#1_86| Int) (v_ArrVal_758 Int) (v_ArrVal_756 Int) (v_ArrVal_754 Int)) (or (<= 0 (let ((.cse0 (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_87| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_754) (+ (* |v_ULTIMATE.start_main_~i~2#1_86| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_756) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ (* (div (* (- 1) .cse0) 2) 2) .cse0))) (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |v_ULTIMATE.start_main_~i~2#1_86| 1))) (not (<= |v_ULTIMATE.start_main_~i~2#1_86| (+ |v_ULTIMATE.start_main_~i~2#1_87| 1))))))) is different from false