./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep05-1.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 ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:17:25,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:17:25,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:17:25,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:17:25,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:17:25,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:17:25,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:17:25,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:17:25,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:17:25,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:17:25,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:17:25,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:17:25,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:17:25,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:17:25,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:17:25,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:17:25,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:17:25,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:17:25,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:17:25,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:17:25,612 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:17:25,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:17:25,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:17:25,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:17:25,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:17:25,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:17:25,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:17:25,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:17:25,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:17:25,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:17:25,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:17:25,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:17:25,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:17:25,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:17:25,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:17:25,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:17:25,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:17:25,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:17:25,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:17:25,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:17:25,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:17:25,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:17:25,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:17:25,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:17:25,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:17:25,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:17:25,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:17:25,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:17:25,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:17:25,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:17:25,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:17:25,652 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:17:25,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:17:25,653 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:17:25,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:17:25,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:17:25,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:17:25,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:17:25,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:17:25,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:17:25,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:17:25,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:17:25,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:17:25,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:17:25,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:17:25,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:17:25,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:17:25,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:17:25,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:17:25,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:17:25,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:17:25,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:17:25,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:17:25,656 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:17:25,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:17:25,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:17:25,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2022-07-11 22:17:25,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:17:25,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:17:25,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:17:25,955 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:17:25,959 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:17:25,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-07-11 22:17:26,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/105480a4e/dc841038c0ca41e8b190d91097f3d184/FLAGe34283221 [2022-07-11 22:17:26,430 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:17:26,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-07-11 22:17:26,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/105480a4e/dc841038c0ca41e8b190d91097f3d184/FLAGe34283221 [2022-07-11 22:17:26,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/105480a4e/dc841038c0ca41e8b190d91097f3d184 [2022-07-11 22:17:26,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:17:26,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:17:26,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:17:26,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:17:26,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:17:26,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:17:26" (1/1) ... [2022-07-11 22:17:26,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2f8262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:26, skipping insertion in model container [2022-07-11 22:17:26,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:17:26" (1/1) ... [2022-07-11 22:17:26,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:17:26,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:17:27,042 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/sep05-1.i[1287,1300] [2022-07-11 22:17:27,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:17:27,051 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:17:27,068 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/sep05-1.i[1287,1300] [2022-07-11 22:17:27,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:17:27,080 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:17:27,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27 WrapperNode [2022-07-11 22:17:27,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:17:27,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:17:27,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:17:27,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:17:27,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,109 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-11 22:17:27,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:17:27,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:17:27,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:17:27,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:17:27,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:17:27,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:17:27,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:17:27,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:17:27,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (1/1) ... [2022-07-11 22:17:27,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:17:27,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:27,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 22:17:27,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 22:17:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:17:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:17:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:17:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:17:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:17:27,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:17:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:17:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:17:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-11 22:17:27,216 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-11 22:17:27,264 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:17:27,266 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:17:27,388 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:17:27,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:17:27,394 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 22:17:27,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:17:27 BoogieIcfgContainer [2022-07-11 22:17:27,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:17:27,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:17:27,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:17:27,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:17:27,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:17:26" (1/3) ... [2022-07-11 22:17:27,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53de4073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:17:27, skipping insertion in model container [2022-07-11 22:17:27,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:17:27" (2/3) ... [2022-07-11 22:17:27,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53de4073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:17:27, skipping insertion in model container [2022-07-11 22:17:27,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:17:27" (3/3) ... [2022-07-11 22:17:27,413 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2022-07-11 22:17:27,426 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:17:27,436 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:17:27,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:17:27,537 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@185ed384, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3cf210d0 [2022-07-11 22:17:27,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:17:27,551 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) [2022-07-11 22:17:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 22:17:27,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:27,561 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] [2022-07-11 22:17:27,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-07-11 22:17:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:27,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080414177] [2022-07-11 22:17:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:27,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 22:17:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:27,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 22:17:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:27,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:17:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:17:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:27,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080414177] [2022-07-11 22:17:27,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080414177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:17:27,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:17:27,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:17:27,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617626394] [2022-07-11 22:17:27,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:17:27,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:17:27,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:17:27,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:17:27,804 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) [2022-07-11 22:17:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:27,835 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-07-11 22:17:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:17:27,839 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 [2022-07-11 22:17:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:27,848 INFO L225 Difference]: With dead ends: 52 [2022-07-11 22:17:27,848 INFO L226 Difference]: Without dead ends: 25 [2022-07-11 22:17:27,852 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 [2022-07-11 22:17:27,857 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 [2022-07-11 22:17:27,858 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] [2022-07-11 22:17:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-11 22:17:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-11 22:17:27,888 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) [2022-07-11 22:17:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-11 22:17:27,890 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-11 22:17:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:27,891 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-11 22:17:27,891 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) [2022-07-11 22:17:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-11 22:17:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:17:27,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:27,894 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] [2022-07-11 22:17:27,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:17:27,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-07-11 22:17:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:27,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234174357] [2022-07-11 22:17:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:27,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:17:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-11 22:17:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:17:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:17:28,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:28,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234174357] [2022-07-11 22:17:28,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234174357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:28,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161494927] [2022-07-11 22:17:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:28,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:28,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:28,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:28,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:17:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:17:28,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:17:28,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:17:28,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161494927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:17:28,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:17:28,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 22:17:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981977282] [2022-07-11 22:17:28,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:17:28,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:17:28,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:17:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:17:28,146 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) [2022-07-11 22:17:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:28,158 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-11 22:17:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:17:28,164 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 [2022-07-11 22:17:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:28,165 INFO L225 Difference]: With dead ends: 45 [2022-07-11 22:17:28,166 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 22:17:28,166 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 [2022-07-11 22:17:28,168 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 [2022-07-11 22:17:28,169 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] [2022-07-11 22:17:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 22:17:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-11 22:17:28,177 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) [2022-07-11 22:17:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-11 22:17:28,179 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-07-11 22:17:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:28,180 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-11 22:17:28,180 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) [2022-07-11 22:17:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-11 22:17:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 22:17:28,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:28,183 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] [2022-07-11 22:17:28,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:28,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:28,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-07-11 22:17:28,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:28,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281491097] [2022-07-11 22:17:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:28,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:17:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 22:17:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:17:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 22:17:28,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281491097] [2022-07-11 22:17:28,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281491097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:28,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754744118] [2022-07-11 22:17:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:28,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:28,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:28,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:17:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:17:28,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 22:17:28,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:17:28,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754744118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:17:28,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:17:28,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 22:17:28,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251630828] [2022-07-11 22:17:28,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:17:28,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:17:28,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:28,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:17:28,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:17:28,682 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) [2022-07-11 22:17:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:28,695 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-11 22:17:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:17:28,696 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 [2022-07-11 22:17:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:28,697 INFO L225 Difference]: With dead ends: 41 [2022-07-11 22:17:28,697 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 22:17:28,697 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 [2022-07-11 22:17:28,698 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 [2022-07-11 22:17:28,699 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] [2022-07-11 22:17:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 22:17:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-11 22:17:28,703 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) [2022-07-11 22:17:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-11 22:17:28,705 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-07-11 22:17:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:28,706 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-11 22:17:28,706 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) [2022-07-11 22:17:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-11 22:17:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 22:17:28,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:28,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:17:28,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:28,923 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 [2022-07-11 22:17:28,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-07-11 22:17:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:28,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449110411] [2022-07-11 22:17:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:17:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:28,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 22:17:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 22:17:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:17:29,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:29,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449110411] [2022-07-11 22:17:29,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449110411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:29,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522002694] [2022-07-11 22:17:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:29,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:29,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:29,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:17:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:17:29,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-11 22:17:29,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-11 22:17:29,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522002694] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:17:29,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:17:29,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-11 22:17:29,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980535516] [2022-07-11 22:17:29,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:29,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 22:17:29,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 22:17:29,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:17:29,182 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) [2022-07-11 22:17:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:29,228 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-11 22:17:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 22:17:29,229 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 [2022-07-11 22:17:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:29,230 INFO L225 Difference]: With dead ends: 58 [2022-07-11 22:17:29,230 INFO L226 Difference]: Without dead ends: 37 [2022-07-11 22:17:29,231 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 [2022-07-11 22:17:29,232 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 [2022-07-11 22:17:29,232 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] [2022-07-11 22:17:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-11 22:17:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-11 22:17:29,237 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) [2022-07-11 22:17:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-11 22:17:29,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-07-11 22:17:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:29,239 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-11 22:17:29,239 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) [2022-07-11 22:17:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-11 22:17:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 22:17:29,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:29,240 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] [2022-07-11 22:17:29,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:29,459 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 [2022-07-11 22:17:29,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-07-11 22:17:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:29,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88533011] [2022-07-11 22:17:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:29,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:29,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-11 22:17:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-11 22:17:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:29,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 22:17:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-11 22:17:29,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:29,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88533011] [2022-07-11 22:17:29,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88533011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728092269] [2022-07-11 22:17:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:17:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:29,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:29,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:17:29,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:17:29,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:17:29,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:17:29,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-11 22:17:29,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-11 22:17:29,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728092269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:17:29,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:17:29,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2022-07-11 22:17:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670319916] [2022-07-11 22:17:29,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:29,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 22:17:29,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 22:17:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:17:29,871 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2022-07-11 22:17:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:29,922 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-07-11 22:17:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 22:17:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 [2022-07-11 22:17:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:29,926 INFO L225 Difference]: With dead ends: 64 [2022-07-11 22:17:29,926 INFO L226 Difference]: Without dead ends: 40 [2022-07-11 22:17:29,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:17:29,931 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:17:29,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:17:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-11 22:17:29,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-07-11 22:17:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2022-07-11 22:17:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-07-11 22:17:29,952 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 56 [2022-07-11 22:17:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:29,952 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-07-11 22:17:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2022-07-11 22:17:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-07-11 22:17:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 22:17:29,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:29,957 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:17:29,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:30,170 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 [2022-07-11 22:17:30,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1253498369, now seen corresponding path program 3 times [2022-07-11 22:17:30,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:30,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700863072] [2022-07-11 22:17:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:30,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:17:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 22:17:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 22:17:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-11 22:17:30,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700863072] [2022-07-11 22:17:30,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700863072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:30,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900878223] [2022-07-11 22:17:30,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:17:30,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:30,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:30,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:17:30,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 22:17:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:17:30,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:17:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-11 22:17:30,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-11 22:17:30,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900878223] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:17:30,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:17:30,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-11 22:17:30,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916277521] [2022-07-11 22:17:30,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:30,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:17:30,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:17:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:17:30,492 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2022-07-11 22:17:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:30,526 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-07-11 22:17:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 22:17:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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 60 [2022-07-11 22:17:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:30,533 INFO L225 Difference]: With dead ends: 73 [2022-07-11 22:17:30,533 INFO L226 Difference]: Without dead ends: 48 [2022-07-11 22:17:30,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:17:30,535 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:17:30,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:17:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-11 22:17:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-11 22:17:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 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) [2022-07-11 22:17:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-11 22:17:30,546 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 60 [2022-07-11 22:17:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:30,547 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-11 22:17:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2022-07-11 22:17:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-11 22:17:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-11 22:17:30,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:30,548 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:17:30,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:30,748 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 [2022-07-11 22:17:30,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -156103101, now seen corresponding path program 4 times [2022-07-11 22:17:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:30,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150719010] [2022-07-11 22:17:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:17:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:17:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:17:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-11 22:17:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:30,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150719010] [2022-07-11 22:17:30,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150719010] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:30,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494327370] [2022-07-11 22:17:30,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:17:30,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:30,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:30,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:30,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:17:31,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:17:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:17:31,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:17:31,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-11 22:17:31,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-11 22:17:31,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494327370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:17:31,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:17:31,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-11 22:17:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206469633] [2022-07-11 22:17:31,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:17:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:31,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:17:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:17:31,099 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2022-07-11 22:17:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:31,132 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2022-07-11 22:17:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 22:17:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 87 [2022-07-11 22:17:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:31,135 INFO L225 Difference]: With dead ends: 78 [2022-07-11 22:17:31,135 INFO L226 Difference]: Without dead ends: 52 [2022-07-11 22:17:31,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:17:31,138 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:17:31,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 95 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:17:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-11 22:17:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-11 22:17:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 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) [2022-07-11 22:17:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-11 22:17:31,147 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 87 [2022-07-11 22:17:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:31,148 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-11 22:17:31,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2022-07-11 22:17:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-11 22:17:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:17:31,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:31,149 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:17:31,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:31,368 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 [2022-07-11 22:17:31,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2081062919, now seen corresponding path program 5 times [2022-07-11 22:17:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:31,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428375471] [2022-07-11 22:17:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:31,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:17:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:31,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:17:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:17:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-11 22:17:32,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:32,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428375471] [2022-07-11 22:17:32,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428375471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:32,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137272642] [2022-07-11 22:17:32,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:17:32,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:32,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:32,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:32,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:17:32,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-11 22:17:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:17:32,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-11 22:17:32,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-11 22:17:33,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 4 proven. 315 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-11 22:17:33,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137272642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:17:33,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:17:33,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 25 [2022-07-11 22:17:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365155553] [2022-07-11 22:17:33,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:33,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:17:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:17:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:17:33,653 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-11 22:17:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:33,971 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2022-07-11 22:17:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 22:17:33,972 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 91 [2022-07-11 22:17:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:33,976 INFO L225 Difference]: With dead ends: 147 [2022-07-11 22:17:33,977 INFO L226 Difference]: Without dead ends: 143 [2022-07-11 22:17:33,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:17:33,978 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:17:33,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1215 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:17:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-11 22:17:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2022-07-11 22:17:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.26) internal successors, (126), 101 states have internal predecessors, (126), 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) [2022-07-11 22:17:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-07-11 22:17:34,024 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 91 [2022-07-11 22:17:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:34,025 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-07-11 22:17:34,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-11 22:17:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-07-11 22:17:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:17:34,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:34,032 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:17:34,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:34,255 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 [2022-07-11 22:17:34,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1533846007, now seen corresponding path program 1 times [2022-07-11 22:17:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:34,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963411477] [2022-07-11 22:17:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:34,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:34,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:17:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:17:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:34,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:17:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 89 proven. 264 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-11 22:17:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963411477] [2022-07-11 22:17:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963411477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013927788] [2022-07-11 22:17:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:34,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:34,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:34,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:34,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:17:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:35,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-11 22:17:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:35,369 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 [2022-07-11 22:17:35,408 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 [2022-07-11 22:17:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 181 proven. 132 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 22:17:35,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:36,541 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-11 22:17:36,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:17:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 191 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-11 22:17:36,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013927788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:17:36,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:17:36,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 15] total 45 [2022-07-11 22:17:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632727189] [2022-07-11 22:17:36,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-11 22:17:36,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:36,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-11 22:17:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1826, Unknown=0, NotChecked=0, Total=1980 [2022-07-11 22:17:36,610 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-11 22:17:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:38,999 INFO L93 Difference]: Finished difference Result 443 states and 648 transitions. [2022-07-11 22:17:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-11 22:17:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 91 [2022-07-11 22:17:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:39,003 INFO L225 Difference]: With dead ends: 443 [2022-07-11 22:17:39,003 INFO L226 Difference]: Without dead ends: 317 [2022-07-11 22:17:39,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=607, Invalid=6199, Unknown=0, NotChecked=0, Total=6806 [2022-07-11 22:17:39,007 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 188 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:17:39,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 558 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1053 Invalid, 0 Unknown, 508 Unchecked, 0.7s Time] [2022-07-11 22:17:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-11 22:17:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2022-07-11 22:17:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 249 states have (on average 1.3373493975903614) internal successors, (333), 254 states have internal predecessors, (333), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68) [2022-07-11 22:17:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 412 transitions. [2022-07-11 22:17:39,042 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 412 transitions. Word has length 91 [2022-07-11 22:17:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:39,042 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 412 transitions. [2022-07-11 22:17:39,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-11 22:17:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 412 transitions. [2022-07-11 22:17:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:17:39,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:39,046 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:17:39,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:39,275 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 [2022-07-11 22:17:39,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1955738939, now seen corresponding path program 2 times [2022-07-11 22:17:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:39,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418227101] [2022-07-11 22:17:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:39,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:39,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:17:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:39,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:17:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:39,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:17:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-11 22:17:40,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:40,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418227101] [2022-07-11 22:17:40,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418227101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:40,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105078833] [2022-07-11 22:17:40,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:17:40,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:40,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:40,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:40,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:17:40,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:17:40,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:17:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-11 22:17:40,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,453 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 [2022-07-11 22:17:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,567 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 [2022-07-11 22:17:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,604 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 [2022-07-11 22:17:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,640 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 [2022-07-11 22:17:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,693 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 [2022-07-11 22:17:40,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:40,748 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:17:40,748 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 [2022-07-11 22:17:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 12 proven. 366 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 22:17:41,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:48,256 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-11 22:17:48,256 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 [2022-07-11 22:17:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 107 proven. 244 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-11 22:17:48,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105078833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:17:48,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:17:48,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 24] total 59 [2022-07-11 22:17:48,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454450385] [2022-07-11 22:17:48,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:48,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-11 22:17:48,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-11 22:17:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3173, Unknown=10, NotChecked=0, Total=3422 [2022-07-11 22:17:48,509 INFO L87 Difference]: Start difference. First operand 269 states and 412 transitions. Second operand has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 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) [2022-07-11 22:17:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:17:51,456 INFO L93 Difference]: Finished difference Result 956 states and 1525 transitions. [2022-07-11 22:17:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-11 22:17:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 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 91 [2022-07-11 22:17:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:17:51,462 INFO L225 Difference]: With dead ends: 956 [2022-07-11 22:17:51,462 INFO L226 Difference]: Without dead ends: 672 [2022-07-11 22:17:51,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 169 SyntacticMatches, 16 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=704, Invalid=8216, Unknown=10, NotChecked=0, Total=8930 [2022-07-11 22:17:51,467 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 200 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 876 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:17:51,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1245 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1640 Invalid, 0 Unknown, 876 Unchecked, 1.0s Time] [2022-07-11 22:17:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-07-11 22:17:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 583. [2022-07-11 22:17:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 544 states have (on average 1.3474264705882353) internal successors, (733), 559 states have internal predecessors, (733), 17 states have call successors, (17), 6 states have call predecessors, (17), 21 states have return successors, (208), 17 states have call predecessors, (208), 17 states have call successors, (208) [2022-07-11 22:17:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 958 transitions. [2022-07-11 22:17:51,529 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 958 transitions. Word has length 91 [2022-07-11 22:17:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:17:51,530 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 958 transitions. [2022-07-11 22:17:51,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 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) [2022-07-11 22:17:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 958 transitions. [2022-07-11 22:17:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:17:51,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:17:51,535 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:17:51,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:17:51,755 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 [2022-07-11 22:17:51,755 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:17:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:17:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash 801199241, now seen corresponding path program 3 times [2022-07-11 22:17:51,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:17:51,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220875553] [2022-07-11 22:17:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:17:51,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:17:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:52,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:17:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:52,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:17:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:52,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:17:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:17:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 190 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-11 22:17:52,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:17:52,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220875553] [2022-07-11 22:17:52,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220875553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362924496] [2022-07-11 22:17:52,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:17:52,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:17:52,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:17:52,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:17:52,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:17:52,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-11 22:17:52,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:17:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-11 22:17:52,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:17:53,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:17:53,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:17:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:53,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-07-11 22:17:53,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:53,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-07-11 22:17:53,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:53,380 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 29 treesize of output 24 [2022-07-11 22:17:53,419 INFO L356 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2022-07-11 22:17:53,420 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 40 treesize of output 46 [2022-07-11 22:17:53,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:53,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:53,561 INFO L356 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2022-07-11 22:17:53,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 72 [2022-07-11 22:17:53,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:17:53,784 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 33 treesize of output 26 [2022-07-11 22:17:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 214 proven. 137 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-11 22:17:54,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:17:54,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362924496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:17:54,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:17:54,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 50 [2022-07-11 22:17:54,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282384230] [2022-07-11 22:17:54,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:17:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-11 22:17:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:17:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-11 22:17:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2368, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 22:17:54,482 INFO L87 Difference]: Start difference. First operand 583 states and 958 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 22:18:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:16,254 INFO L93 Difference]: Finished difference Result 2551 states and 4576 transitions. [2022-07-11 22:18:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-07-11 22:18:16,254 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-11 22:18:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:16,275 INFO L225 Difference]: With dead ends: 2551 [2022-07-11 22:18:16,276 INFO L226 Difference]: Without dead ends: 2165 [2022-07-11 22:18:16,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16913 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=2878, Invalid=40156, Unknown=22, NotChecked=0, Total=43056 [2022-07-11 22:18:16,291 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1878 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:16,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 341 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1167 Invalid, 0 Unknown, 1878 Unchecked, 0.6s Time] [2022-07-11 22:18:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2022-07-11 22:18:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1626. [2022-07-11 22:18:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1552 states have (on average 1.4149484536082475) internal successors, (2196), 1590 states have internal predecessors, (2196), 25 states have call successors, (25), 10 states have call predecessors, (25), 48 states have return successors, (610), 25 states have call predecessors, (610), 25 states have call successors, (610) [2022-07-11 22:18:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2831 transitions. [2022-07-11 22:18:16,611 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2831 transitions. Word has length 91 [2022-07-11 22:18:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:16,611 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 2831 transitions. [2022-07-11 22:18:16,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 22:18:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2831 transitions. [2022-07-11 22:18:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:18:16,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:16,625 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:16,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:16,839 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 [2022-07-11 22:18:16,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:16,840 INFO L85 PathProgramCache]: Analyzing trace with hash 86918213, now seen corresponding path program 4 times [2022-07-11 22:18:16,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:16,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912834322] [2022-07-11 22:18:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:18:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:17,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:18:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:17,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:18:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 188 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-11 22:18:17,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:17,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912834322] [2022-07-11 22:18:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912834322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:17,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072589363] [2022-07-11 22:18:17,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:18:17,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:17,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:18:17,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:18:17,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:18:17,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-11 22:18:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:18,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:18,167 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 [2022-07-11 22:18:18,417 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-11 22:18:18,417 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 34 [2022-07-11 22:18:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:18,537 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-07-11 22:18:18,538 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 2 case distinctions, treesize of input 54 treesize of output 56 [2022-07-11 22:18:18,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:18,788 INFO L356 Elim1Store]: treesize reduction 183, result has 42.8 percent of original size [2022-07-11 22:18:18,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 105 treesize of output 184 [2022-07-11 22:18:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:19,695 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 37 treesize of output 30 [2022-07-11 22:18:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:18:19,731 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 33 treesize of output 26 [2022-07-11 22:18:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 6 proven. 382 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-11 22:18:20,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:52,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072589363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:52,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:18:52,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 50 [2022-07-11 22:18:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045399752] [2022-07-11 22:18:52,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:52,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-11 22:18:52,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-11 22:18:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3460, Unknown=21, NotChecked=0, Total=3782 [2022-07-11 22:18:52,808 INFO L87 Difference]: Start difference. First operand 1626 states and 2831 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:19:02,362 WARN L233 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 65 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:19:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:19:10,745 INFO L93 Difference]: Finished difference Result 4661 states and 7861 transitions. [2022-07-11 22:19:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-11 22:19:10,746 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 91 [2022-07-11 22:19:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:19:10,767 INFO L225 Difference]: With dead ends: 4661 [2022-07-11 22:19:10,768 INFO L226 Difference]: Without dead ends: 2801 [2022-07-11 22:19:10,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 107 SyntacticMatches, 11 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=1054, Invalid=10915, Unknown=21, NotChecked=0, Total=11990 [2022-07-11 22:19:10,780 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 81 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1282 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:19:10,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 974 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1424 Invalid, 0 Unknown, 1282 Unchecked, 0.8s Time] [2022-07-11 22:19:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2022-07-11 22:19:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2400. [2022-07-11 22:19:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2278 states have (on average 1.3928884986830554) internal successors, (3173), 2336 states have internal predecessors, (3173), 42 states have call successors, (42), 21 states have call predecessors, (42), 79 states have return successors, (998), 42 states have call predecessors, (998), 42 states have call successors, (998) [2022-07-11 22:19:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 4213 transitions. [2022-07-11 22:19:11,185 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 4213 transitions. Word has length 91 [2022-07-11 22:19:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:19:11,186 INFO L495 AbstractCegarLoop]: Abstraction has 2400 states and 4213 transitions. [2022-07-11 22:19:11,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 22:19:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 4213 transitions. [2022-07-11 22:19:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:19:11,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:19:11,208 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:19:11,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 22:19:11,431 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 [2022-07-11 22:19:11,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:19:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:19:11,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1791202551, now seen corresponding path program 5 times [2022-07-11 22:19:11,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:19:11,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421655851] [2022-07-11 22:19:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:19:11,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:19:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:11,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:19:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:19:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:11,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:19:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 172 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-11 22:19:12,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:19:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421655851] [2022-07-11 22:19:12,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421655851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:19:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871632390] [2022-07-11 22:19:12,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:19:12,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:19:12,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:19:12,112 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) [2022-07-11 22:19:12,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:19:12,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-11 22:19:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:19:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-11 22:19:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:19:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:19:12,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-07-11 22:19:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:19:12,577 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 50 treesize of output 31 [2022-07-11 22:19:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:19:12,662 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:19:12,663 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 59 treesize of output 34 [2022-07-11 22:19:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:19:12,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-07-11 22:19:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:19:12,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-07-11 22:19:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:19:12,780 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 29 treesize of output 24 [2022-07-11 22:19:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 186 proven. 154 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 22:19:13,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:19:13,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871632390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:19:13,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:19:13,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 37 [2022-07-11 22:19:13,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479313560] [2022-07-11 22:19:13,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:19:13,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-11 22:19:13,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:19:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-11 22:19:13,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2022-07-11 22:19:13,364 INFO L87 Difference]: Start difference. First operand 2400 states and 4213 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 22:19:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:19:15,550 INFO L93 Difference]: Finished difference Result 5016 states and 8957 transitions. [2022-07-11 22:19:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-11 22:19:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 91 [2022-07-11 22:19:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:19:15,575 INFO L225 Difference]: With dead ends: 5016 [2022-07-11 22:19:15,575 INFO L226 Difference]: Without dead ends: 2887 [2022-07-11 22:19:15,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=559, Invalid=4697, Unknown=0, NotChecked=0, Total=5256 [2022-07-11 22:19:15,592 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:19:15,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 455 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 860 Invalid, 0 Unknown, 587 Unchecked, 0.5s Time] [2022-07-11 22:19:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-11 22:19:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2831. [2022-07-11 22:19:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2671 states have (on average 1.355672032946462) internal successors, (3621), 2725 states have internal predecessors, (3621), 68 states have call successors, (68), 37 states have call predecessors, (68), 91 states have return successors, (1244), 68 states have call predecessors, (1244), 68 states have call successors, (1244) [2022-07-11 22:19:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 4933 transitions. [2022-07-11 22:19:16,099 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 4933 transitions. Word has length 91 [2022-07-11 22:19:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:19:16,100 INFO L495 AbstractCegarLoop]: Abstraction has 2831 states and 4933 transitions. [2022-07-11 22:19:16,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 22:19:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 4933 transitions. [2022-07-11 22:19:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:19:16,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:19:16,135 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:19:16,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:19:16,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 22:19:16,348 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:19:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:19:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1790257655, now seen corresponding path program 6 times [2022-07-11 22:19:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:19:16,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786268220] [2022-07-11 22:19:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:19:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:19:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:16,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:19:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:16,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:19:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:16,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:19:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:19:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-11 22:19:16,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:19:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786268220] [2022-07-11 22:19:16,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786268220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:19:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915024004] [2022-07-11 22:19:16,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:19:16,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:19:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:19:16,888 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:19:16,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:19:17,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-11 22:19:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:19:17,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-11 22:19:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:19:17,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:19:17,295 INFO L356 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2022-07-11 22:19:17,295 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 2 case distinctions, treesize of input 40 treesize of output 37 [2022-07-11 22:19:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 248 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-11 22:19:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:19:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 293 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-11 22:19:21,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915024004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:19:21,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:19:21,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 13] total 40 [2022-07-11 22:19:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521174795] [2022-07-11 22:19:21,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:19:21,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-11 22:19:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:19:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-11 22:19:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1366, Unknown=2, NotChecked=0, Total=1560 [2022-07-11 22:19:21,791 INFO L87 Difference]: Start difference. First operand 2831 states and 4933 transitions. Second operand has 40 states, 40 states have (on average 2.6) internal successors, (104), 39 states have internal predecessors, (104), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-11 22:21:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:21:46,834 INFO L93 Difference]: Finished difference Result 7170 states and 13655 transitions. [2022-07-11 22:21:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-11 22:21:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 39 states have internal predecessors, (104), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 91 [2022-07-11 22:21:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:21:46,879 INFO L225 Difference]: With dead ends: 7170 [2022-07-11 22:21:46,880 INFO L226 Difference]: Without dead ends: 4211 [2022-07-11 22:21:46,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 181 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 148.2s TimeCoverageRelationStatistics Valid=999, Invalid=7497, Unknown=60, NotChecked=0, Total=8556 [2022-07-11 22:21:46,915 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:21:46,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 280 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 711 Invalid, 0 Unknown, 319 Unchecked, 0.5s Time] [2022-07-11 22:21:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2022-07-11 22:21:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 2947. [2022-07-11 22:21:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2750 states have (on average 1.3381818181818181) internal successors, (3680), 2842 states have internal predecessors, (3680), 63 states have call successors, (63), 41 states have call predecessors, (63), 133 states have return successors, (1825), 63 states have call predecessors, (1825), 63 states have call successors, (1825) [2022-07-11 22:21:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5568 transitions. [2022-07-11 22:21:47,583 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5568 transitions. Word has length 91 [2022-07-11 22:21:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:21:47,583 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5568 transitions. [2022-07-11 22:21:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 39 states have internal predecessors, (104), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-11 22:21:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5568 transitions. [2022-07-11 22:21:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 22:21:47,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:47,618 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:47,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:21:47,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 22:21:47,831 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:47,832 INFO L85 PathProgramCache]: Analyzing trace with hash 31675077, now seen corresponding path program 7 times [2022-07-11 22:21:47,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:47,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786302918] [2022-07-11 22:21:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:47,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:48,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:21:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:48,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 22:21:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:48,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:21:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-11 22:21:48,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:48,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786302918] [2022-07-11 22:21:48,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786302918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:21:48,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6497239] [2022-07-11 22:21:48,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:21:48,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:21:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:21:48,414 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:21:48,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 22:21:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:48,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-11 22:21:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates...