./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/lockfree-3.0.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:14:27,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:14:27,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:14:27,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:14:27,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:14:27,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:14:27,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:14:27,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:14:27,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:14:27,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:14:27,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:14:27,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:14:27,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:14:27,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:14:27,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:14:27,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:14:27,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:14:27,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:14:27,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:14:27,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:14:27,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:14:27,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:14:27,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:14:27,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:14:27,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:14:27,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:14:27,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:14:27,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:14:27,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:14:27,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:14:27,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:14:27,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:14:27,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:14:27,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:14:27,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:14:27,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:14:27,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:14:27,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:14:27,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:14:27,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:14:27,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:14:27,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:14:27,734 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:14:27,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:14:27,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:14:27,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:14:27,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:14:27,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:14:27,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:14:27,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:14:27,736 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:14:27,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:14:27,737 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:14:27,737 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:14:27,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:14:27,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:14:27,738 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:14:27,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:14:27,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:14:27,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:14:27,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:14:27,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:14:27,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:14:27,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:14:27,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:14:27,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:14:27,740 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:14:27,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:14:27,740 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:14:27,740 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2023-02-17 08:14:27,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:14:27,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:14:27,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:14:27,977 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:14:27,977 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:14:27,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/lockfree-3.0.i [2023-02-17 08:14:28,996 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:14:29,262 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:14:29,262 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/lockfree-3.0.i [2023-02-17 08:14:29,272 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a4f42279/126c1770f212493192ca3c07cb998b40/FLAG17a006ddd [2023-02-17 08:14:29,285 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a4f42279/126c1770f212493192ca3c07cb998b40 [2023-02-17 08:14:29,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:14:29,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:14:29,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:14:29,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:14:29,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:14:29,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b99122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29, skipping insertion in model container [2023-02-17 08:14:29,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:14:29,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:14:29,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:14:29,570 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:14:29,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:14:29,630 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:14:29,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29 WrapperNode [2023-02-17 08:14:29,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:14:29,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:14:29,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:14:29,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:14:29,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,680 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2023-02-17 08:14:29,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:14:29,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:14:29,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:14:29,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:14:29,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,700 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:14:29,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:14:29,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:14:29,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:14:29,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (1/1) ... [2023-02-17 08:14:29,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:14:29,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:29,734 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) [2023-02-17 08:14:29,738 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 [2023-02-17 08:14:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 08:14:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 08:14:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:14:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 08:14:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 08:14:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 08:14:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:14:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 08:14:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:14:29,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:14:29,837 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:14:29,839 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:14:30,109 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:14:30,114 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:14:30,114 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 08:14:30,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:14:30 BoogieIcfgContainer [2023-02-17 08:14:30,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:14:30,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:14:30,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:14:30,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:14:30,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:14:29" (1/3) ... [2023-02-17 08:14:30,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6caafee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:14:30, skipping insertion in model container [2023-02-17 08:14:30,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:14:29" (2/3) ... [2023-02-17 08:14:30,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6caafee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:14:30, skipping insertion in model container [2023-02-17 08:14:30,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:14:30" (3/3) ... [2023-02-17 08:14:30,122 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2023-02-17 08:14:30,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:14:30,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-02-17 08:14:30,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:14:30,172 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c292765, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:14:30,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-02-17 08:14:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 08:14:30,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:30,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 08:14:30,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash 28819106, now seen corresponding path program 1 times [2023-02-17 08:14:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:30,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670588117] [2023-02-17 08:14:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:30,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:30,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670588117] [2023-02-17 08:14:30,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670588117] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:30,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:30,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:14:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570642963] [2023-02-17 08:14:30,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 08:14:30,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 08:14:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 08:14:30,354 INFO L87 Difference]: Start difference. First operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:30,381 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-02-17 08:14:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 08:14:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-17 08:14:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:30,391 INFO L225 Difference]: With dead ends: 64 [2023-02-17 08:14:30,391 INFO L226 Difference]: Without dead ends: 62 [2023-02-17 08:14:30,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 08:14:30,397 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:30,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-17 08:14:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-17 08:14:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.880952380952381) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-02-17 08:14:30,434 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 5 [2023-02-17 08:14:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:30,435 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-02-17 08:14:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-02-17 08:14:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 08:14:30,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:30,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:30,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:14:30,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:30,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1806851052, now seen corresponding path program 1 times [2023-02-17 08:14:30,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644169018] [2023-02-17 08:14:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:30,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:30,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644169018] [2023-02-17 08:14:30,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644169018] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:30,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:30,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:14:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13282984] [2023-02-17 08:14:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:14:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:14:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,477 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:30,493 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2023-02-17 08:14:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:14:30,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 08:14:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:30,495 INFO L225 Difference]: With dead ends: 63 [2023-02-17 08:14:30,496 INFO L226 Difference]: Without dead ends: 63 [2023-02-17 08:14:30,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,497 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 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 [2023-02-17 08:14:30,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-17 08:14:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-17 08:14:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2023-02-17 08:14:30,504 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 7 [2023-02-17 08:14:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:30,505 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2023-02-17 08:14:30,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2023-02-17 08:14:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 08:14:30,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:30,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:30,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:14:30,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:30,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1806910634, now seen corresponding path program 1 times [2023-02-17 08:14:30,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:30,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701727656] [2023-02-17 08:14:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:30,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:30,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:30,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701727656] [2023-02-17 08:14:30,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701727656] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:30,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:30,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:14:30,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809416552] [2023-02-17 08:14:30,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:30,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:14:30,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:14:30,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,552 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:30,581 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2023-02-17 08:14:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:14:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 08:14:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:30,582 INFO L225 Difference]: With dead ends: 111 [2023-02-17 08:14:30,583 INFO L226 Difference]: Without dead ends: 111 [2023-02-17 08:14:30,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,584 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:30,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-17 08:14:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2023-02-17 08:14:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.8767123287671232) internal successors, (137), 92 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions. [2023-02-17 08:14:30,591 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 7 [2023-02-17 08:14:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:30,591 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 137 transitions. [2023-02-17 08:14:30,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions. [2023-02-17 08:14:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:14:30,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:30,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:30,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:14:30,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash 177749355, now seen corresponding path program 1 times [2023-02-17 08:14:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112395110] [2023-02-17 08:14:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:30,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:30,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112395110] [2023-02-17 08:14:30,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112395110] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:30,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:30,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:14:30,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594216827] [2023-02-17 08:14:30,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:30,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:14:30,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:14:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:14:30,657 INFO L87 Difference]: Start difference. First operand 93 states and 137 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:30,687 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2023-02-17 08:14:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:14:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:14:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:30,688 INFO L225 Difference]: With dead ends: 101 [2023-02-17 08:14:30,688 INFO L226 Difference]: Without dead ends: 101 [2023-02-17 08:14:30,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:14:30,689 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:30,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 211 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-17 08:14:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2023-02-17 08:14:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 139 transitions. [2023-02-17 08:14:30,695 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 139 transitions. Word has length 8 [2023-02-17 08:14:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:30,695 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 139 transitions. [2023-02-17 08:14:30,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 139 transitions. [2023-02-17 08:14:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:14:30,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:30,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:30,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:14:30,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:30,697 INFO L85 PathProgramCache]: Analyzing trace with hash 179653412, now seen corresponding path program 1 times [2023-02-17 08:14:30,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:30,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814351643] [2023-02-17 08:14:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:30,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:30,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:30,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814351643] [2023-02-17 08:14:30,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814351643] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:30,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:30,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:14:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728555654] [2023-02-17 08:14:30,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:30,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:14:30,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:14:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,722 INFO L87 Difference]: Start difference. First operand 95 states and 139 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:30,792 INFO L93 Difference]: Finished difference Result 177 states and 261 transitions. [2023-02-17 08:14:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:14:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:14:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:30,793 INFO L225 Difference]: With dead ends: 177 [2023-02-17 08:14:30,794 INFO L226 Difference]: Without dead ends: 174 [2023-02-17 08:14:30,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,795 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:30,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-17 08:14:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2023-02-17 08:14:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.849624060150376) internal successors, (246), 152 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 246 transitions. [2023-02-17 08:14:30,812 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 246 transitions. Word has length 8 [2023-02-17 08:14:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:30,812 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 246 transitions. [2023-02-17 08:14:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 246 transitions. [2023-02-17 08:14:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:14:30,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:30,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:14:30,813 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 179596397, now seen corresponding path program 1 times [2023-02-17 08:14:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:30,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721778155] [2023-02-17 08:14:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:30,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721778155] [2023-02-17 08:14:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721778155] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:30,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:30,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:14:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285368576] [2023-02-17 08:14:30,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:14:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:30,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:14:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,873 INFO L87 Difference]: Start difference. First operand 153 states and 246 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:30,927 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2023-02-17 08:14:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:14:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:14:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:30,929 INFO L225 Difference]: With dead ends: 231 [2023-02-17 08:14:30,929 INFO L226 Difference]: Without dead ends: 231 [2023-02-17 08:14:30,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:30,934 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 69 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:30,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 172 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-02-17 08:14:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2023-02-17 08:14:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 190 states have (on average 1.7894736842105263) internal successors, (340), 207 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 340 transitions. [2023-02-17 08:14:30,956 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 340 transitions. Word has length 8 [2023-02-17 08:14:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:30,956 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 340 transitions. [2023-02-17 08:14:30,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 340 transitions. [2023-02-17 08:14:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:14:30,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:30,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:30,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 08:14:30,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:30,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:30,958 INFO L85 PathProgramCache]: Analyzing trace with hash 179596398, now seen corresponding path program 1 times [2023-02-17 08:14:30,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:30,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176049330] [2023-02-17 08:14:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:30,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:31,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:31,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176049330] [2023-02-17 08:14:31,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176049330] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:31,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:31,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:14:31,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196137970] [2023-02-17 08:14:31,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:31,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:14:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:31,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:14:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:31,022 INFO L87 Difference]: Start difference. First operand 208 states and 340 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:31,060 INFO L93 Difference]: Finished difference Result 226 states and 346 transitions. [2023-02-17 08:14:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:14:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 08:14:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:31,061 INFO L225 Difference]: With dead ends: 226 [2023-02-17 08:14:31,062 INFO L226 Difference]: Without dead ends: 226 [2023-02-17 08:14:31,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:14:31,062 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 68 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:31,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 180 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-17 08:14:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2023-02-17 08:14:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.7473684210526317) internal successors, (332), 205 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 332 transitions. [2023-02-17 08:14:31,075 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 332 transitions. Word has length 8 [2023-02-17 08:14:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:31,075 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 332 transitions. [2023-02-17 08:14:31,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 332 transitions. [2023-02-17 08:14:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 08:14:31,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:31,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:31,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 08:14:31,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1272529015, now seen corresponding path program 1 times [2023-02-17 08:14:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:31,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258938680] [2023-02-17 08:14:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:31,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258938680] [2023-02-17 08:14:31,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258938680] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:31,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:31,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:14:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983778188] [2023-02-17 08:14:31,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:31,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:14:31,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:14:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:14:31,126 INFO L87 Difference]: Start difference. First operand 206 states and 332 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:31,162 INFO L93 Difference]: Finished difference Result 445 states and 675 transitions. [2023-02-17 08:14:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:14:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 08:14:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:31,164 INFO L225 Difference]: With dead ends: 445 [2023-02-17 08:14:31,164 INFO L226 Difference]: Without dead ends: 445 [2023-02-17 08:14:31,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:31,166 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 105 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:31,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 360 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-02-17 08:14:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 354. [2023-02-17 08:14:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 338 states have (on average 1.680473372781065) internal successors, (568), 353 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 568 transitions. [2023-02-17 08:14:31,175 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 568 transitions. Word has length 9 [2023-02-17 08:14:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:31,175 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 568 transitions. [2023-02-17 08:14:31,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 568 transitions. [2023-02-17 08:14:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 08:14:31,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:31,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:31,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 08:14:31,176 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash 845049582, now seen corresponding path program 1 times [2023-02-17 08:14:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:31,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229487556] [2023-02-17 08:14:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229487556] [2023-02-17 08:14:31,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229487556] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:31,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:31,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:14:31,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940851376] [2023-02-17 08:14:31,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:31,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:14:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:14:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:14:31,219 INFO L87 Difference]: Start difference. First operand 354 states and 568 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:31,255 INFO L93 Difference]: Finished difference Result 826 states and 1228 transitions. [2023-02-17 08:14:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:14:31,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 08:14:31,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:31,260 INFO L225 Difference]: With dead ends: 826 [2023-02-17 08:14:31,260 INFO L226 Difference]: Without dead ends: 826 [2023-02-17 08:14:31,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:31,262 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 93 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:31,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 353 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2023-02-17 08:14:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 594. [2023-02-17 08:14:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 578 states have (on average 1.5778546712802768) internal successors, (912), 593 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 912 transitions. [2023-02-17 08:14:31,275 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 912 transitions. Word has length 10 [2023-02-17 08:14:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:31,275 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 912 transitions. [2023-02-17 08:14:31,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 912 transitions. [2023-02-17 08:14:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 08:14:31,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:31,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:31,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 08:14:31,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash 22246394, now seen corresponding path program 1 times [2023-02-17 08:14:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562380056] [2023-02-17 08:14:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:31,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:31,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562380056] [2023-02-17 08:14:31,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562380056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:31,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:31,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:14:31,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550991193] [2023-02-17 08:14:31,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:31,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:14:31,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:14:31,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:14:31,376 INFO L87 Difference]: Start difference. First operand 594 states and 912 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:31,407 INFO L93 Difference]: Finished difference Result 906 states and 1406 transitions. [2023-02-17 08:14:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:14:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-17 08:14:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:31,410 INFO L225 Difference]: With dead ends: 906 [2023-02-17 08:14:31,411 INFO L226 Difference]: Without dead ends: 906 [2023-02-17 08:14:31,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:31,412 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 99 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:31,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 279 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-02-17 08:14:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 888. [2023-02-17 08:14:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 872 states have (on average 1.603211009174312) internal successors, (1398), 887 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1398 transitions. [2023-02-17 08:14:31,435 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1398 transitions. Word has length 16 [2023-02-17 08:14:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:31,435 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1398 transitions. [2023-02-17 08:14:31,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,436 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1398 transitions. [2023-02-17 08:14:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 08:14:31,439 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:31,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:31,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 08:14:31,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash 617603772, now seen corresponding path program 1 times [2023-02-17 08:14:31,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:31,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007889356] [2023-02-17 08:14:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:31,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:31,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007889356] [2023-02-17 08:14:31,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007889356] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:31,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683344534] [2023-02-17 08:14:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:31,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:31,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:31,501 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) [2023-02-17 08:14:31,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:14:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:31,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 08:14:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:31,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:31,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683344534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:31,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:31,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-02-17 08:14:31,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198243237] [2023-02-17 08:14:31,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:14:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:14:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:14:31,660 INFO L87 Difference]: Start difference. First operand 888 states and 1398 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:31,729 INFO L93 Difference]: Finished difference Result 2236 states and 3388 transitions. [2023-02-17 08:14:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 08:14:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-17 08:14:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:31,736 INFO L225 Difference]: With dead ends: 2236 [2023-02-17 08:14:31,736 INFO L226 Difference]: Without dead ends: 2236 [2023-02-17 08:14:31,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:31,737 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 236 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:31,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 622 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2023-02-17 08:14:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1272. [2023-02-17 08:14:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1256 states have (on average 1.5684713375796178) internal successors, (1970), 1271 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1970 transitions. [2023-02-17 08:14:31,761 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1970 transitions. Word has length 16 [2023-02-17 08:14:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:31,761 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1970 transitions. [2023-02-17 08:14:31,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1970 transitions. [2023-02-17 08:14:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 08:14:31,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:31,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:31,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:31,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 08:14:31,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1214108262, now seen corresponding path program 1 times [2023-02-17 08:14:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40206] [2023-02-17 08:14:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:31,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:14:32,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:32,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40206] [2023-02-17 08:14:32,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40206] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:32,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:32,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:14:32,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082733327] [2023-02-17 08:14:32,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:32,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:14:32,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:32,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:14:32,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:14:32,006 INFO L87 Difference]: Start difference. First operand 1272 states and 1970 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:32,036 INFO L93 Difference]: Finished difference Result 473 states and 648 transitions. [2023-02-17 08:14:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:14:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 08:14:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:32,038 INFO L225 Difference]: With dead ends: 473 [2023-02-17 08:14:32,038 INFO L226 Difference]: Without dead ends: 473 [2023-02-17 08:14:32,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:14:32,039 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 106 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:32,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 243 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-17 08:14:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 353. [2023-02-17 08:14:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 341 states have (on average 1.501466275659824) internal successors, (512), 352 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 512 transitions. [2023-02-17 08:14:32,045 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 512 transitions. Word has length 21 [2023-02-17 08:14:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:32,046 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 512 transitions. [2023-02-17 08:14:32,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 512 transitions. [2023-02-17 08:14:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 08:14:32,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:32,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:32,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 08:14:32,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:32,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1692627395, now seen corresponding path program 1 times [2023-02-17 08:14:32,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:32,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687382983] [2023-02-17 08:14:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:32,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:32,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:32,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687382983] [2023-02-17 08:14:32,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687382983] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:32,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695879615] [2023-02-17 08:14:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:32,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:32,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:32,115 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) [2023-02-17 08:14:32,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 08:14:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:32,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 08:14:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:32,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:32,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695879615] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:32,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:32,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-02-17 08:14:32,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995904576] [2023-02-17 08:14:32,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:32,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:14:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:32,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:14:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:14:32,225 INFO L87 Difference]: Start difference. First operand 353 states and 512 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:32,275 INFO L93 Difference]: Finished difference Result 1051 states and 1510 transitions. [2023-02-17 08:14:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:14:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 08:14:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:32,278 INFO L225 Difference]: With dead ends: 1051 [2023-02-17 08:14:32,278 INFO L226 Difference]: Without dead ends: 1051 [2023-02-17 08:14:32,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:14:32,279 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 180 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:32,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 161 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2023-02-17 08:14:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1007. [2023-02-17 08:14:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 995 states have (on average 1.485427135678392) internal successors, (1478), 1006 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1478 transitions. [2023-02-17 08:14:32,292 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1478 transitions. Word has length 24 [2023-02-17 08:14:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:32,293 INFO L495 AbstractCegarLoop]: Abstraction has 1007 states and 1478 transitions. [2023-02-17 08:14:32,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1478 transitions. [2023-02-17 08:14:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 08:14:32,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:32,294 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:32,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:32,498 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,SelfDestructingSolverStorable12 [2023-02-17 08:14:32,499 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash -6965384, now seen corresponding path program 1 times [2023-02-17 08:14:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:32,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751859570] [2023-02-17 08:14:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:32,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:32,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751859570] [2023-02-17 08:14:32,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751859570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632583071] [2023-02-17 08:14:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:32,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:32,580 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) [2023-02-17 08:14:32,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 08:14:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 08:14:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:32,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:32,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632583071] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:32,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:32,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-02-17 08:14:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379500860] [2023-02-17 08:14:32,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:32,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 08:14:32,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 08:14:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:14:32,699 INFO L87 Difference]: Start difference. First operand 1007 states and 1478 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:32,806 INFO L93 Difference]: Finished difference Result 3857 states and 5384 transitions. [2023-02-17 08:14:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 08:14:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 08:14:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:32,817 INFO L225 Difference]: With dead ends: 3857 [2023-02-17 08:14:32,818 INFO L226 Difference]: Without dead ends: 3857 [2023-02-17 08:14:32,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-02-17 08:14:32,818 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 690 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:32,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 474 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2023-02-17 08:14:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 2177. [2023-02-17 08:14:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2165 states have (on average 1.464203233256351) internal successors, (3170), 2176 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3170 transitions. [2023-02-17 08:14:32,863 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3170 transitions. Word has length 27 [2023-02-17 08:14:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:32,863 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 3170 transitions. [2023-02-17 08:14:32,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3170 transitions. [2023-02-17 08:14:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 08:14:32,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:32,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:32,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 08:14:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:33,069 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 554127938, now seen corresponding path program 1 times [2023-02-17 08:14:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:33,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382974528] [2023-02-17 08:14:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:14:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382974528] [2023-02-17 08:14:33,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382974528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131040227] [2023-02-17 08:14:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:33,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:33,162 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) [2023-02-17 08:14:33,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 08:14:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 08:14:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:14:33,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:14:33,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131040227] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:33,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:33,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2023-02-17 08:14:33,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604093593] [2023-02-17 08:14:33,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:33,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:14:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:33,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:14:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:14:33,283 INFO L87 Difference]: Start difference. First operand 2177 states and 3170 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:33,348 INFO L93 Difference]: Finished difference Result 1889 states and 2651 transitions. [2023-02-17 08:14:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:14:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 08:14:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:33,354 INFO L225 Difference]: With dead ends: 1889 [2023-02-17 08:14:33,354 INFO L226 Difference]: Without dead ends: 1889 [2023-02-17 08:14:33,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:33,356 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 418 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:33,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 653 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2023-02-17 08:14:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 831. [2023-02-17 08:14:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 819 states have (on average 1.468864468864469) internal successors, (1203), 830 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1203 transitions. [2023-02-17 08:14:33,372 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1203 transitions. Word has length 27 [2023-02-17 08:14:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:33,373 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1203 transitions. [2023-02-17 08:14:33,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1203 transitions. [2023-02-17 08:14:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 08:14:33,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:33,375 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:33,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:33,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 08:14:33,583 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2001409998, now seen corresponding path program 1 times [2023-02-17 08:14:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:33,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626302731] [2023-02-17 08:14:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 08:14:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626302731] [2023-02-17 08:14:33,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626302731] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865867920] [2023-02-17 08:14:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:33,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:33,698 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) [2023-02-17 08:14:33,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 08:14:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 08:14:33,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:33,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:14:33,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865867920] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:33,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:33,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2023-02-17 08:14:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537033218] [2023-02-17 08:14:33,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:33,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 08:14:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 08:14:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:33,871 INFO L87 Difference]: Start difference. First operand 831 states and 1203 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:34,038 INFO L93 Difference]: Finished difference Result 3249 states and 4495 transitions. [2023-02-17 08:14:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 08:14:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-17 08:14:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:34,046 INFO L225 Difference]: With dead ends: 3249 [2023-02-17 08:14:34,047 INFO L226 Difference]: Without dead ends: 3249 [2023-02-17 08:14:34,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2023-02-17 08:14:34,048 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1293 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:34,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 861 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2023-02-17 08:14:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 1101. [2023-02-17 08:14:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1089 states have (on average 1.45821854912764) internal successors, (1588), 1100 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1588 transitions. [2023-02-17 08:14:34,072 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1588 transitions. Word has length 51 [2023-02-17 08:14:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:34,073 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1588 transitions. [2023-02-17 08:14:34,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1588 transitions. [2023-02-17 08:14:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 08:14:34,074 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:34,075 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:34,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:34,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 08:14:34,281 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:34,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1426339750, now seen corresponding path program 1 times [2023-02-17 08:14:34,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:34,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649391825] [2023-02-17 08:14:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 08:14:34,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:34,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649391825] [2023-02-17 08:14:34,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649391825] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:34,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275786465] [2023-02-17 08:14:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:34,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:34,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:34,368 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) [2023-02-17 08:14:34,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 08:14:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 08:14:34,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 08:14:34,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 08:14:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275786465] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:34,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:14:34,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2023-02-17 08:14:34,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521499360] [2023-02-17 08:14:34,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:14:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:14:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:34,487 INFO L87 Difference]: Start difference. First operand 1101 states and 1588 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:34,565 INFO L93 Difference]: Finished difference Result 2427 states and 3410 transitions. [2023-02-17 08:14:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:14:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-17 08:14:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:34,572 INFO L225 Difference]: With dead ends: 2427 [2023-02-17 08:14:34,572 INFO L226 Difference]: Without dead ends: 2427 [2023-02-17 08:14:34,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-17 08:14:34,573 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 223 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 500 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2023-02-17 08:14:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1749. [2023-02-17 08:14:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1737 states have (on average 1.4352331606217616) internal successors, (2493), 1748 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2493 transitions. [2023-02-17 08:14:34,604 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2493 transitions. Word has length 59 [2023-02-17 08:14:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:34,604 INFO L495 AbstractCegarLoop]: Abstraction has 1749 states and 2493 transitions. [2023-02-17 08:14:34,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2493 transitions. [2023-02-17 08:14:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 08:14:34,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:34,607 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:34,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 08:14:34,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 08:14:34,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:34,814 INFO L85 PathProgramCache]: Analyzing trace with hash -443713253, now seen corresponding path program 1 times [2023-02-17 08:14:34,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:34,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844333808] [2023-02-17 08:14:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:34,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 08:14:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:34,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844333808] [2023-02-17 08:14:34,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844333808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:34,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129774848] [2023-02-17 08:14:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:34,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:34,915 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) [2023-02-17 08:14:34,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 08:14:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 08:14:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-17 08:14:35,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-17 08:14:35,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129774848] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:35,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:35,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2023-02-17 08:14:35,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055430293] [2023-02-17 08:14:35,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:14:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:14:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:14:35,069 INFO L87 Difference]: Start difference. First operand 1749 states and 2493 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:35,791 INFO L93 Difference]: Finished difference Result 9763 states and 13743 transitions. [2023-02-17 08:14:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 08:14:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-17 08:14:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:35,815 INFO L225 Difference]: With dead ends: 9763 [2023-02-17 08:14:35,816 INFO L226 Difference]: Without dead ends: 9763 [2023-02-17 08:14:35,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=631, Invalid=2021, Unknown=0, NotChecked=0, Total=2652 [2023-02-17 08:14:35,817 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1118 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:35,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 888 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:14:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9763 states. [2023-02-17 08:14:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9763 to 4918. [2023-02-17 08:14:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4907 states have (on average 1.4634196046464234) internal successors, (7181), 4917 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 7181 transitions. [2023-02-17 08:14:35,905 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 7181 transitions. Word has length 59 [2023-02-17 08:14:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:35,905 INFO L495 AbstractCegarLoop]: Abstraction has 4918 states and 7181 transitions. [2023-02-17 08:14:35,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 7181 transitions. [2023-02-17 08:14:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:14:35,907 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:35,907 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:35,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 08:14:36,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:36,117 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash -791217300, now seen corresponding path program 1 times [2023-02-17 08:14:36,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:36,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478064126] [2023-02-17 08:14:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:36,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 08:14:36,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478064126] [2023-02-17 08:14:36,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478064126] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749236660] [2023-02-17 08:14:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:36,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:36,230 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) [2023-02-17 08:14:36,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 08:14:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:36,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 08:14:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 08:14:36,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 103 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 08:14:36,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749236660] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:36,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:36,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-02-17 08:14:36,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086150517] [2023-02-17 08:14:36,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:36,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:14:36,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:14:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:14:36,387 INFO L87 Difference]: Start difference. First operand 4918 states and 7181 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:36,647 INFO L93 Difference]: Finished difference Result 10540 states and 15062 transitions. [2023-02-17 08:14:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 08:14:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-17 08:14:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:36,667 INFO L225 Difference]: With dead ends: 10540 [2023-02-17 08:14:36,668 INFO L226 Difference]: Without dead ends: 10540 [2023-02-17 08:14:36,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 08:14:36,669 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1102 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:36,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 1577 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2023-02-17 08:14:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 4718. [2023-02-17 08:14:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4718 states, 4707 states have (on average 1.4418950499256427) internal successors, (6787), 4717 states have internal predecessors, (6787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4718 states to 4718 states and 6787 transitions. [2023-02-17 08:14:36,782 INFO L78 Accepts]: Start accepts. Automaton has 4718 states and 6787 transitions. Word has length 63 [2023-02-17 08:14:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:36,783 INFO L495 AbstractCegarLoop]: Abstraction has 4718 states and 6787 transitions. [2023-02-17 08:14:36,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4718 states and 6787 transitions. [2023-02-17 08:14:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:14:36,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:36,784 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:36,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:36,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:36,990 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash 767429099, now seen corresponding path program 1 times [2023-02-17 08:14:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:36,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322776957] [2023-02-17 08:14:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:36,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 08:14:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:37,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322776957] [2023-02-17 08:14:37,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322776957] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:37,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606041578] [2023-02-17 08:14:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:37,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:37,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:37,101 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) [2023-02-17 08:14:37,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 08:14:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 08:14:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 08:14:37,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 08:14:37,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606041578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:37,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:37,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-02-17 08:14:37,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675791724] [2023-02-17 08:14:37,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:37,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:14:37,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:37,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:14:37,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:14:37,242 INFO L87 Difference]: Start difference. First operand 4718 states and 6787 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:37,417 INFO L93 Difference]: Finished difference Result 3827 states and 5204 transitions. [2023-02-17 08:14:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 08:14:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-17 08:14:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:37,423 INFO L225 Difference]: With dead ends: 3827 [2023-02-17 08:14:37,423 INFO L226 Difference]: Without dead ends: 3827 [2023-02-17 08:14:37,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2023-02-17 08:14:37,424 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 835 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:37,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 1770 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2023-02-17 08:14:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 2865. [2023-02-17 08:14:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2854 states have (on average 1.3587946741415557) internal successors, (3878), 2864 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3878 transitions. [2023-02-17 08:14:37,474 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3878 transitions. Word has length 63 [2023-02-17 08:14:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3878 transitions. [2023-02-17 08:14:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3878 transitions. [2023-02-17 08:14:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 08:14:37,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:37,475 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:37,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:37,686 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 965172541, now seen corresponding path program 1 times [2023-02-17 08:14:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:37,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209769315] [2023-02-17 08:14:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:37,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 08:14:37,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209769315] [2023-02-17 08:14:37,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209769315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542712057] [2023-02-17 08:14:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:37,759 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) [2023-02-17 08:14:37,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 08:14:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 08:14:37,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 08:14:37,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 08:14:37,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542712057] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:37,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:37,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-17 08:14:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408553050] [2023-02-17 08:14:37,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:37,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:14:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:14:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:14:37,863 INFO L87 Difference]: Start difference. First operand 2865 states and 3878 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:37,900 INFO L93 Difference]: Finished difference Result 2863 states and 3849 transitions. [2023-02-17 08:14:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:14:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-02-17 08:14:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:37,903 INFO L225 Difference]: With dead ends: 2863 [2023-02-17 08:14:37,904 INFO L226 Difference]: Without dead ends: 2863 [2023-02-17 08:14:37,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:14:37,905 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 110 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:37,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 256 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2023-02-17 08:14:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2854. [2023-02-17 08:14:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2843 states have (on average 1.3524446007738304) internal successors, (3845), 2853 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3845 transitions. [2023-02-17 08:14:37,927 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3845 transitions. Word has length 64 [2023-02-17 08:14:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:37,928 INFO L495 AbstractCegarLoop]: Abstraction has 2854 states and 3845 transitions. [2023-02-17 08:14:37,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3845 transitions. [2023-02-17 08:14:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 08:14:37,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:37,929 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:37,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:38,134 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,SelfDestructingSolverStorable20 [2023-02-17 08:14:38,134 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:38,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1737502264, now seen corresponding path program 1 times [2023-02-17 08:14:38,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:38,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582724137] [2023-02-17 08:14:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:38,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 08:14:38,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:38,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582724137] [2023-02-17 08:14:38,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582724137] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767633760] [2023-02-17 08:14:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:38,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:38,250 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) [2023-02-17 08:14:38,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 08:14:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 08:14:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-17 08:14:38,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 97 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-17 08:14:38,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767633760] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:38,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:38,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2023-02-17 08:14:38,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738169367] [2023-02-17 08:14:38,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:38,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:14:38,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:38,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:14:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:14:38,410 INFO L87 Difference]: Start difference. First operand 2854 states and 3845 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:38,567 INFO L93 Difference]: Finished difference Result 3939 states and 5369 transitions. [2023-02-17 08:14:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 08:14:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-02-17 08:14:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:38,573 INFO L225 Difference]: With dead ends: 3939 [2023-02-17 08:14:38,573 INFO L226 Difference]: Without dead ends: 3939 [2023-02-17 08:14:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-02-17 08:14:38,575 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 328 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:38,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 880 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2023-02-17 08:14:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2136. [2023-02-17 08:14:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2125 states have (on average 1.348235294117647) internal successors, (2865), 2135 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2865 transitions. [2023-02-17 08:14:38,610 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2865 transitions. Word has length 65 [2023-02-17 08:14:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:38,610 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 2865 transitions. [2023-02-17 08:14:38,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2865 transitions. [2023-02-17 08:14:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 08:14:38,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:38,615 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:38,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:38,820 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,SelfDestructingSolverStorable21 [2023-02-17 08:14:38,820 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1937207539, now seen corresponding path program 1 times [2023-02-17 08:14:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:38,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463458819] [2023-02-17 08:14:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:38,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-17 08:14:38,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463458819] [2023-02-17 08:14:38,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463458819] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700662511] [2023-02-17 08:14:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:38,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:38,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:38,972 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) [2023-02-17 08:14:38,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 08:14:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 08:14:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:39,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:14:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-17 08:14:39,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-17 08:14:39,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700662511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:39,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:39,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 08:14:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245061480] [2023-02-17 08:14:39,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:39,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:14:39,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:14:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:14:39,112 INFO L87 Difference]: Start difference. First operand 2136 states and 2865 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:39,286 INFO L93 Difference]: Finished difference Result 3817 states and 5033 transitions. [2023-02-17 08:14:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:14:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-02-17 08:14:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:39,291 INFO L225 Difference]: With dead ends: 3817 [2023-02-17 08:14:39,292 INFO L226 Difference]: Without dead ends: 3817 [2023-02-17 08:14:39,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:39,292 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 401 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:39,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 499 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2023-02-17 08:14:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3102. [2023-02-17 08:14:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3091 states have (on average 1.3604011646716272) internal successors, (4205), 3101 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4205 transitions. [2023-02-17 08:14:39,322 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4205 transitions. Word has length 69 [2023-02-17 08:14:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:39,322 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 4205 transitions. [2023-02-17 08:14:39,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4205 transitions. [2023-02-17 08:14:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-17 08:14:39,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:39,323 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:39,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-17 08:14:39,528 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,SelfDestructingSolverStorable22 [2023-02-17 08:14:39,529 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1779624174, now seen corresponding path program 1 times [2023-02-17 08:14:39,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:39,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935028089] [2023-02-17 08:14:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:39,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-02-17 08:14:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:39,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935028089] [2023-02-17 08:14:39,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935028089] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:39,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:14:39,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:14:39,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213772087] [2023-02-17 08:14:39,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:39,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:14:39,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:39,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:14:39,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:39,625 INFO L87 Difference]: Start difference. First operand 3102 states and 4205 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:39,694 INFO L93 Difference]: Finished difference Result 7297 states and 9512 transitions. [2023-02-17 08:14:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:14:39,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-02-17 08:14:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:39,704 INFO L225 Difference]: With dead ends: 7297 [2023-02-17 08:14:39,704 INFO L226 Difference]: Without dead ends: 7297 [2023-02-17 08:14:39,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:14:39,705 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 198 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:39,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 404 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2023-02-17 08:14:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 3290. [2023-02-17 08:14:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3279 states have (on average 1.364135407136322) internal successors, (4473), 3289 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4473 transitions. [2023-02-17 08:14:39,755 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4473 transitions. Word has length 88 [2023-02-17 08:14:39,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:39,756 INFO L495 AbstractCegarLoop]: Abstraction has 3290 states and 4473 transitions. [2023-02-17 08:14:39,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4473 transitions. [2023-02-17 08:14:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-17 08:14:39,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:39,758 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 6, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-17 08:14:39,758 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1563813689, now seen corresponding path program 1 times [2023-02-17 08:14:39,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:39,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819473319] [2023-02-17 08:14:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 53 proven. 83 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-02-17 08:14:39,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:39,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819473319] [2023-02-17 08:14:39,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819473319] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:39,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122906251] [2023-02-17 08:14:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:39,843 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) [2023-02-17 08:14:39,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 08:14:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:39,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 08:14:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 117 proven. 57 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-02-17 08:14:39,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 117 proven. 57 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-02-17 08:14:39,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122906251] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:39,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:39,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 9 [2023-02-17 08:14:39,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449823094] [2023-02-17 08:14:39,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:39,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 08:14:39,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 08:14:39,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:14:39,992 INFO L87 Difference]: Start difference. First operand 3290 states and 4473 transitions. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:40,526 INFO L93 Difference]: Finished difference Result 17636 states and 21843 transitions. [2023-02-17 08:14:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-17 08:14:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-02-17 08:14:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:40,550 INFO L225 Difference]: With dead ends: 17636 [2023-02-17 08:14:40,551 INFO L226 Difference]: Without dead ends: 17636 [2023-02-17 08:14:40,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=617, Invalid=3543, Unknown=0, NotChecked=0, Total=4160 [2023-02-17 08:14:40,553 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 1982 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1982 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:40,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1982 Valid, 2218 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:14:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17636 states. [2023-02-17 08:14:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17636 to 7968. [2023-02-17 08:14:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7968 states, 7957 states have (on average 1.3236144275480708) internal successors, (10532), 7967 states have internal predecessors, (10532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7968 states to 7968 states and 10532 transitions. [2023-02-17 08:14:40,672 INFO L78 Accepts]: Start accepts. Automaton has 7968 states and 10532 transitions. Word has length 93 [2023-02-17 08:14:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:40,672 INFO L495 AbstractCegarLoop]: Abstraction has 7968 states and 10532 transitions. [2023-02-17 08:14:40,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7968 states and 10532 transitions. [2023-02-17 08:14:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-17 08:14:40,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:40,678 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:40,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:40,884 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,SelfDestructingSolverStorable24 [2023-02-17 08:14:40,885 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash -353808855, now seen corresponding path program 1 times [2023-02-17 08:14:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:40,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479703263] [2023-02-17 08:14:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:40,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 82 proven. 163 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-17 08:14:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:40,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479703263] [2023-02-17 08:14:40,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479703263] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:40,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751567397] [2023-02-17 08:14:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:40,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:40,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:40,966 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) [2023-02-17 08:14:40,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 08:14:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:41,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 08:14:41,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-02-17 08:14:41,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:14:41,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751567397] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:14:41,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:14:41,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-02-17 08:14:41,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007031987] [2023-02-17 08:14:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:41,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:14:41,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:14:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:41,075 INFO L87 Difference]: Start difference. First operand 7968 states and 10532 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:41,104 INFO L93 Difference]: Finished difference Result 8869 states and 11411 transitions. [2023-02-17 08:14:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:14:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2023-02-17 08:14:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:41,116 INFO L225 Difference]: With dead ends: 8869 [2023-02-17 08:14:41,117 INFO L226 Difference]: Without dead ends: 8809 [2023-02-17 08:14:41,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:41,117 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:41,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8809 states. [2023-02-17 08:14:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8809 to 8008. [2023-02-17 08:14:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 7997 states have (on average 1.3039889958734525) internal successors, (10428), 8007 states have internal predecessors, (10428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 10428 transitions. [2023-02-17 08:14:41,251 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 10428 transitions. Word has length 102 [2023-02-17 08:14:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:41,252 INFO L495 AbstractCegarLoop]: Abstraction has 8008 states and 10428 transitions. [2023-02-17 08:14:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 10428 transitions. [2023-02-17 08:14:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-17 08:14:41,255 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:41,255 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 7, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:41,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:41,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:41,461 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1398070387, now seen corresponding path program 1 times [2023-02-17 08:14:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578803812] [2023-02-17 08:14:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:41,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 156 proven. 1 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-17 08:14:41,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578803812] [2023-02-17 08:14:41,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578803812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140754292] [2023-02-17 08:14:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:41,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:41,571 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:41,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 08:14:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 08:14:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:41,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140754292] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:41,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:41,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-02-17 08:14:41,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233416900] [2023-02-17 08:14:41,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:41,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 08:14:41,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 08:14:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:41,723 INFO L87 Difference]: Start difference. First operand 8008 states and 10428 transitions. Second operand has 13 states, 13 states have (on average 11.923076923076923) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:41,830 INFO L93 Difference]: Finished difference Result 10761 states and 13202 transitions. [2023-02-17 08:14:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:14:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.923076923076923) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-02-17 08:14:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:41,843 INFO L225 Difference]: With dead ends: 10761 [2023-02-17 08:14:41,843 INFO L226 Difference]: Without dead ends: 10761 [2023-02-17 08:14:41,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2023-02-17 08:14:41,844 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 291 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:41,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 1032 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10761 states. [2023-02-17 08:14:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10761 to 7164. [2023-02-17 08:14:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7153 states have (on average 1.2603103592898084) internal successors, (9015), 7163 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 9015 transitions. [2023-02-17 08:14:41,921 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 9015 transitions. Word has length 103 [2023-02-17 08:14:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:41,921 INFO L495 AbstractCegarLoop]: Abstraction has 7164 states and 9015 transitions. [2023-02-17 08:14:41,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.923076923076923) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 9015 transitions. [2023-02-17 08:14:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-17 08:14:41,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:41,924 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:41,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:42,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 08:14:42,131 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -727668713, now seen corresponding path program 1 times [2023-02-17 08:14:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:42,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282282417] [2023-02-17 08:14:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 92 proven. 3 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-02-17 08:14:42,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282282417] [2023-02-17 08:14:42,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282282417] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828830711] [2023-02-17 08:14:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:42,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:42,236 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:42,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 08:14:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 08:14:42,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-02-17 08:14:42,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-02-17 08:14:42,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828830711] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:42,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:42,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2023-02-17 08:14:42,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228813209] [2023-02-17 08:14:42,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:42,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:14:42,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:14:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:14:42,416 INFO L87 Difference]: Start difference. First operand 7164 states and 9015 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:42,532 INFO L93 Difference]: Finished difference Result 4230 states and 5015 transitions. [2023-02-17 08:14:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 08:14:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2023-02-17 08:14:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:42,538 INFO L225 Difference]: With dead ends: 4230 [2023-02-17 08:14:42,538 INFO L226 Difference]: Without dead ends: 4230 [2023-02-17 08:14:42,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 211 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-17 08:14:42,539 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 454 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:42,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1635 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2023-02-17 08:14:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 2200. [2023-02-17 08:14:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2190 states have (on average 1.2018264840182649) internal successors, (2632), 2199 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 2632 transitions. [2023-02-17 08:14:42,563 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 2632 transitions. Word has length 106 [2023-02-17 08:14:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:42,563 INFO L495 AbstractCegarLoop]: Abstraction has 2200 states and 2632 transitions. [2023-02-17 08:14:42,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 2632 transitions. [2023-02-17 08:14:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-17 08:14:42,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:42,565 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:42,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:42,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-17 08:14:42,770 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -932844676, now seen corresponding path program 1 times [2023-02-17 08:14:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:42,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599060227] [2023-02-17 08:14:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:42,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599060227] [2023-02-17 08:14:42,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599060227] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055731106] [2023-02-17 08:14:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:42,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:42,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:42,871 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:42,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 08:14:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:42,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 08:14:42,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:42,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:14:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:43,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:43,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055731106] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:43,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:43,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-17 08:14:43,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93527465] [2023-02-17 08:14:43,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:43,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:14:43,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:14:43,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:43,014 INFO L87 Difference]: Start difference. First operand 2200 states and 2632 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:43,194 INFO L93 Difference]: Finished difference Result 3112 states and 3675 transitions. [2023-02-17 08:14:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:14:43,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-02-17 08:14:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:43,198 INFO L225 Difference]: With dead ends: 3112 [2023-02-17 08:14:43,199 INFO L226 Difference]: Without dead ends: 3112 [2023-02-17 08:14:43,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:43,199 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 327 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:43,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 408 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2023-02-17 08:14:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2201. [2023-02-17 08:14:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2192 states have (on average 1.2020985401459854) internal successors, (2635), 2200 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2635 transitions. [2023-02-17 08:14:43,222 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2635 transitions. Word has length 111 [2023-02-17 08:14:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:43,222 INFO L495 AbstractCegarLoop]: Abstraction has 2201 states and 2635 transitions. [2023-02-17 08:14:43,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:43,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2635 transitions. [2023-02-17 08:14:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-17 08:14:43,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:43,224 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:43,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:43,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 08:14:43,430 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:43,431 INFO L85 PathProgramCache]: Analyzing trace with hash -932844675, now seen corresponding path program 1 times [2023-02-17 08:14:43,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:43,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860032798] [2023-02-17 08:14:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:43,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:43,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860032798] [2023-02-17 08:14:43,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860032798] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:43,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986178994] [2023-02-17 08:14:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:43,594 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:43,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 08:14:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:43,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 08:14:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:43,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:14:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:43,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:43,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986178994] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:43,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:43,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-02-17 08:14:43,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902498637] [2023-02-17 08:14:43,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:43,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 08:14:43,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 08:14:43,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-02-17 08:14:43,847 INFO L87 Difference]: Start difference. First operand 2201 states and 2635 transitions. Second operand has 16 states, 15 states have (on average 12.2) internal successors, (183), 16 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:44,373 INFO L93 Difference]: Finished difference Result 6394 states and 7590 transitions. [2023-02-17 08:14:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 08:14:44,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 12.2) internal successors, (183), 16 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-02-17 08:14:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:44,381 INFO L225 Difference]: With dead ends: 6394 [2023-02-17 08:14:44,381 INFO L226 Difference]: Without dead ends: 6394 [2023-02-17 08:14:44,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=350, Invalid=910, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 08:14:44,382 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 827 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:44,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 1110 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:14:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2023-02-17 08:14:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 2355. [2023-02-17 08:14:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2346 states have (on average 1.2075873827791985) internal successors, (2833), 2354 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 2833 transitions. [2023-02-17 08:14:44,414 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 2833 transitions. Word has length 111 [2023-02-17 08:14:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:44,414 INFO L495 AbstractCegarLoop]: Abstraction has 2355 states and 2833 transitions. [2023-02-17 08:14:44,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 12.2) internal successors, (183), 16 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 2833 transitions. [2023-02-17 08:14:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-17 08:14:44,416 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:44,416 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:44,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:44,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:44,622 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1146584722, now seen corresponding path program 1 times [2023-02-17 08:14:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057669321] [2023-02-17 08:14:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:44,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:44,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057669321] [2023-02-17 08:14:44,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057669321] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:44,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981656119] [2023-02-17 08:14:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:44,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:44,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:44,695 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:44,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 08:14:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 08:14:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:44,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:44,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981656119] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:44,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:44,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-02-17 08:14:44,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804094031] [2023-02-17 08:14:44,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:44,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:14:44,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:44,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:14:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:44,850 INFO L87 Difference]: Start difference. First operand 2355 states and 2833 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:45,001 INFO L93 Difference]: Finished difference Result 4517 states and 5380 transitions. [2023-02-17 08:14:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:14:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-02-17 08:14:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:45,007 INFO L225 Difference]: With dead ends: 4517 [2023-02-17 08:14:45,007 INFO L226 Difference]: Without dead ends: 4517 [2023-02-17 08:14:45,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:45,008 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 405 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:45,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 483 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2023-02-17 08:14:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 2355. [2023-02-17 08:14:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2346 states have (on average 1.2046035805626598) internal successors, (2826), 2354 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 2826 transitions. [2023-02-17 08:14:45,033 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 2826 transitions. Word has length 112 [2023-02-17 08:14:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:45,033 INFO L495 AbstractCegarLoop]: Abstraction has 2355 states and 2826 transitions. [2023-02-17 08:14:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 2826 transitions. [2023-02-17 08:14:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-02-17 08:14:45,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:45,035 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:45,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:45,241 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1937224330, now seen corresponding path program 1 times [2023-02-17 08:14:45,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:45,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992166406] [2023-02-17 08:14:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992166406] [2023-02-17 08:14:45,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992166406] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511526076] [2023-02-17 08:14:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:45,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:45,344 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:45,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 08:14:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 08:14:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:45,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:45,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511526076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:45,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:45,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-17 08:14:45,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098498433] [2023-02-17 08:14:45,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:45,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:14:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:14:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:14:45,493 INFO L87 Difference]: Start difference. First operand 2355 states and 2826 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:45,629 INFO L93 Difference]: Finished difference Result 4513 states and 5376 transitions. [2023-02-17 08:14:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:14:45,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-02-17 08:14:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:45,633 INFO L225 Difference]: With dead ends: 4513 [2023-02-17 08:14:45,634 INFO L226 Difference]: Without dead ends: 4513 [2023-02-17 08:14:45,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 229 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:45,635 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 537 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:45,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 266 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4513 states. [2023-02-17 08:14:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4513 to 2356. [2023-02-17 08:14:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2347 states have (on average 1.2045164039198977) internal successors, (2827), 2355 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 2827 transitions. [2023-02-17 08:14:45,662 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 2827 transitions. Word has length 114 [2023-02-17 08:14:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:45,663 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 2827 transitions. [2023-02-17 08:14:45,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 2827 transitions. [2023-02-17 08:14:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-17 08:14:45,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:45,665 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:45,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:45,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-17 08:14:45,871 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:45,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash -374280255, now seen corresponding path program 1 times [2023-02-17 08:14:45,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:45,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731152690] [2023-02-17 08:14:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 54 proven. 262 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-17 08:14:46,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731152690] [2023-02-17 08:14:46,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731152690] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756850724] [2023-02-17 08:14:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:46,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:46,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:46,593 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:46,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 08:14:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 08:14:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:46,758 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:14:46,760 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:14:46,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:46,792 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 19 [2023-02-17 08:14:46,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:46,796 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 19 [2023-02-17 08:14:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:46,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:46,876 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2023-02-17 08:14:46,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-17 08:14:46,884 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2023-02-17 08:14:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:14:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:46,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756850724] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:46,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:46,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 24 [2023-02-17 08:14:46,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394698553] [2023-02-17 08:14:46,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:46,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 08:14:46,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 08:14:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-02-17 08:14:46,917 INFO L87 Difference]: Start difference. First operand 2356 states and 2827 transitions. Second operand has 25 states, 25 states have (on average 6.6) internal successors, (165), 24 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:47,628 INFO L93 Difference]: Finished difference Result 4853 states and 5747 transitions. [2023-02-17 08:14:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 08:14:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.6) internal successors, (165), 24 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-02-17 08:14:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:47,632 INFO L225 Difference]: With dead ends: 4853 [2023-02-17 08:14:47,633 INFO L226 Difference]: Without dead ends: 4853 [2023-02-17 08:14:47,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 223 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2023-02-17 08:14:47,633 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 734 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:47,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1400 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:14:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2023-02-17 08:14:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 2918. [2023-02-17 08:14:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2909 states have (on average 1.2035063595737368) internal successors, (3501), 2917 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 3501 transitions. [2023-02-17 08:14:47,660 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 3501 transitions. Word has length 117 [2023-02-17 08:14:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:47,660 INFO L495 AbstractCegarLoop]: Abstraction has 2918 states and 3501 transitions. [2023-02-17 08:14:47,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.6) internal successors, (165), 24 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 3501 transitions. [2023-02-17 08:14:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-17 08:14:47,662 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:47,662 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:47,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-17 08:14:47,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-17 08:14:47,868 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 779532359, now seen corresponding path program 1 times [2023-02-17 08:14:47,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216650102] [2023-02-17 08:14:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 80 proven. 321 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 08:14:48,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216650102] [2023-02-17 08:14:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216650102] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278433872] [2023-02-17 08:14:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:48,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:48,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:48,564 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:48,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 08:14:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 08:14:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:48,743 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:14:48,745 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:14:48,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:48,793 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 19 [2023-02-17 08:14:48,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:48,796 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 19 [2023-02-17 08:14:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 80 proven. 317 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 08:14:48,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:49,063 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2023-02-17 08:14:49,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-17 08:14:49,070 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2023-02-17 08:14:49,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:14:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 76 proven. 321 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 08:14:49,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278433872] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:49,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:49,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2023-02-17 08:14:49,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026870816] [2023-02-17 08:14:49,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:49,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 08:14:49,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:49,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 08:14:49,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2023-02-17 08:14:49,139 INFO L87 Difference]: Start difference. First operand 2918 states and 3501 transitions. Second operand has 31 states, 31 states have (on average 8.612903225806452) internal successors, (267), 30 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:52,630 INFO L93 Difference]: Finished difference Result 15559 states and 18113 transitions. [2023-02-17 08:14:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-02-17 08:14:52,631 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 8.612903225806452) internal successors, (267), 30 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-02-17 08:14:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:52,641 INFO L225 Difference]: With dead ends: 15559 [2023-02-17 08:14:52,641 INFO L226 Difference]: Without dead ends: 15559 [2023-02-17 08:14:52,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 214 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5418 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2134, Invalid=14636, Unknown=0, NotChecked=0, Total=16770 [2023-02-17 08:14:52,645 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 2359 mSDsluCounter, 4882 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2359 SdHoareTripleChecker+Valid, 5098 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:52,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2359 Valid, 5098 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-17 08:14:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15559 states. [2023-02-17 08:14:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15559 to 8282. [2023-02-17 08:14:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8273 states have (on average 1.194367218663121) internal successors, (9881), 8281 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 9881 transitions. [2023-02-17 08:14:52,743 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 9881 transitions. Word has length 117 [2023-02-17 08:14:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:52,744 INFO L495 AbstractCegarLoop]: Abstraction has 8282 states and 9881 transitions. [2023-02-17 08:14:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.612903225806452) internal successors, (267), 30 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 9881 transitions. [2023-02-17 08:14:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-17 08:14:52,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:52,747 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:52,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:52,952 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1282212589, now seen corresponding path program 1 times [2023-02-17 08:14:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:52,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506022059] [2023-02-17 08:14:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:53,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506022059] [2023-02-17 08:14:53,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506022059] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510295699] [2023-02-17 08:14:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:53,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:53,090 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:53,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 08:14:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 08:14:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:53,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 14 [2023-02-17 08:14:53,257 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_~garbage~0.base_22 Int)) (let ((.cse0 (select |c_#valid| v_~garbage~0.base_22))) (and (= .cse0 0) (= (store |c_ULTIMATE.start_main_old_#valid#1| v_~garbage~0.base_22 .cse0) |c_#valid|) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| v_~garbage~0.base_22))))) is different from true [2023-02-17 08:14:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 97 trivial. 1 not checked. [2023-02-17 08:14:53,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-17 08:14:53,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510295699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:53,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:53,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2023-02-17 08:14:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189042772] [2023-02-17 08:14:53,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:53,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:14:53,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:53,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:14:53,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2023-02-17 08:14:53,338 INFO L87 Difference]: Start difference. First operand 8282 states and 9881 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:53,645 INFO L93 Difference]: Finished difference Result 18915 states and 22517 transitions. [2023-02-17 08:14:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 08:14:53,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2023-02-17 08:14:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:53,665 INFO L225 Difference]: With dead ends: 18915 [2023-02-17 08:14:53,665 INFO L226 Difference]: Without dead ends: 18897 [2023-02-17 08:14:53,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 230 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=252, Unknown=1, NotChecked=34, Total=380 [2023-02-17 08:14:53,666 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 419 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:53,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 616 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 308 Unchecked, 0.2s Time] [2023-02-17 08:14:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18897 states. [2023-02-17 08:14:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18897 to 14077. [2023-02-17 08:14:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14077 states, 14068 states have (on average 1.193559852146716) internal successors, (16791), 14076 states have internal predecessors, (16791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14077 states to 14077 states and 16791 transitions. [2023-02-17 08:14:53,838 INFO L78 Accepts]: Start accepts. Automaton has 14077 states and 16791 transitions. Word has length 118 [2023-02-17 08:14:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:53,839 INFO L495 AbstractCegarLoop]: Abstraction has 14077 states and 16791 transitions. [2023-02-17 08:14:53,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 14077 states and 16791 transitions. [2023-02-17 08:14:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-17 08:14:53,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:53,847 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 8, 8, 8, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:53,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:54,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:54,053 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash -224880734, now seen corresponding path program 1 times [2023-02-17 08:14:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:54,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910795343] [2023-02-17 08:14:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-17 08:14:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:54,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910795343] [2023-02-17 08:14:54,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910795343] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:54,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465194541] [2023-02-17 08:14:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:54,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:54,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:54,170 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:54,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 08:14:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 08:14:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-17 08:14:54,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-17 08:14:54,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465194541] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:54,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:14:54,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 9 [2023-02-17 08:14:54,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123675018] [2023-02-17 08:14:54,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:14:54,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:14:54,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:54,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:14:54,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:14:54,345 INFO L87 Difference]: Start difference. First operand 14077 states and 16791 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:54,403 INFO L93 Difference]: Finished difference Result 10142 states and 12010 transitions. [2023-02-17 08:14:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:14:54,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2023-02-17 08:14:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:54,412 INFO L225 Difference]: With dead ends: 10142 [2023-02-17 08:14:54,412 INFO L226 Difference]: Without dead ends: 10142 [2023-02-17 08:14:54,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 287 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:54,413 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 178 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:54,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 440 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:14:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2023-02-17 08:14:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 8827. [2023-02-17 08:14:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8827 states, 8818 states have (on average 1.183261510546609) internal successors, (10434), 8826 states have internal predecessors, (10434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8827 states to 8827 states and 10434 transitions. [2023-02-17 08:14:54,490 INFO L78 Accepts]: Start accepts. Automaton has 8827 states and 10434 transitions. Word has length 146 [2023-02-17 08:14:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:54,490 INFO L495 AbstractCegarLoop]: Abstraction has 8827 states and 10434 transitions. [2023-02-17 08:14:54,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8827 states and 10434 transitions. [2023-02-17 08:14:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-17 08:14:54,495 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:54,495 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 9, 9, 7, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:54,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-17 08:14:54,701 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash 368256012, now seen corresponding path program 2 times [2023-02-17 08:14:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:54,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313223644] [2023-02-17 08:14:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 336 proven. 3 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-02-17 08:14:54,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:54,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313223644] [2023-02-17 08:14:54,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313223644] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:54,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554049888] [2023-02-17 08:14:54,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:14:54,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:54,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:54,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:54,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 08:14:55,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:14:55,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:14:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 08:14:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 08:14:55,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 08:14:55,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554049888] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:55,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:55,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-17 08:14:55,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92981236] [2023-02-17 08:14:55,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:55,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 08:14:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 08:14:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:14:55,068 INFO L87 Difference]: Start difference. First operand 8827 states and 10434 transitions. Second operand has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:14:55,216 INFO L93 Difference]: Finished difference Result 10721 states and 12337 transitions. [2023-02-17 08:14:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 08:14:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2023-02-17 08:14:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:14:55,227 INFO L225 Difference]: With dead ends: 10721 [2023-02-17 08:14:55,227 INFO L226 Difference]: Without dead ends: 10721 [2023-02-17 08:14:55,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 309 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2023-02-17 08:14:55,228 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 866 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:14:55,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1748 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:14:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2023-02-17 08:14:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 7513. [2023-02-17 08:14:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7504 states have (on average 1.1560501066098081) internal successors, (8675), 7512 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 8675 transitions. [2023-02-17 08:14:55,300 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 8675 transitions. Word has length 155 [2023-02-17 08:14:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:14:55,301 INFO L495 AbstractCegarLoop]: Abstraction has 7513 states and 8675 transitions. [2023-02-17 08:14:55,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:14:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 8675 transitions. [2023-02-17 08:14:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-17 08:14:55,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:14:55,304 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:14:55,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 08:14:55,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-17 08:14:55,511 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:14:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:14:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1761139834, now seen corresponding path program 1 times [2023-02-17 08:14:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:14:55,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168643436] [2023-02-17 08:14:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:14:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 679 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-17 08:14:56,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:14:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168643436] [2023-02-17 08:14:56,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168643436] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:14:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427777574] [2023-02-17 08:14:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:14:56,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:14:56,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:14:56,207 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:14:56,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 08:14:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:14:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 08:14:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:14:56,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:14:56,389 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:14:56,391 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:14:56,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:56,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:14:56,427 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,452 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,467 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,469 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,474 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,476 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,484 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,486 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:14:56,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:56,516 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 19 [2023-02-17 08:14:56,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:56,518 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 19 [2023-02-17 08:14:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 683 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-17 08:14:56,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:14:56,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:56,990 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:14:56,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:56,993 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 36 [2023-02-17 08:14:56,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 08:14:57,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:57,001 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:14:57,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:14:57,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:57,009 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 20 [2023-02-17 08:14:57,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:57,013 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:14:57,015 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:14:57,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:14:57,017 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 20 [2023-02-17 08:14:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 96 proven. 687 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-17 08:14:57,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427777574] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:14:57,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:14:57,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2023-02-17 08:14:57,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434451073] [2023-02-17 08:14:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:14:57,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 08:14:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:14:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 08:14:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2023-02-17 08:14:57,177 INFO L87 Difference]: Start difference. First operand 7513 states and 8675 transitions. Second operand has 33 states, 33 states have (on average 9.424242424242424) internal successors, (311), 32 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:15:00,238 INFO L93 Difference]: Finished difference Result 35907 states and 40796 transitions. [2023-02-17 08:15:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-17 08:15:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 9.424242424242424) internal successors, (311), 32 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2023-02-17 08:15:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:15:00,269 INFO L225 Difference]: With dead ends: 35907 [2023-02-17 08:15:00,270 INFO L226 Difference]: Without dead ends: 35907 [2023-02-17 08:15:00,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 300 SyntacticMatches, 9 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4739 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2246, Invalid=13253, Unknown=1, NotChecked=0, Total=15500 [2023-02-17 08:15:00,273 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 2805 mSDsluCounter, 4653 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2805 SdHoareTripleChecker+Valid, 4938 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:15:00,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2805 Valid, 4938 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-17 08:15:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35907 states. [2023-02-17 08:15:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35907 to 13380. [2023-02-17 08:15:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13380 states, 13371 states have (on average 1.1522698377084735) internal successors, (15407), 13379 states have internal predecessors, (15407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13380 states to 13380 states and 15407 transitions. [2023-02-17 08:15:00,469 INFO L78 Accepts]: Start accepts. Automaton has 13380 states and 15407 transitions. Word has length 162 [2023-02-17 08:15:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:15:00,470 INFO L495 AbstractCegarLoop]: Abstraction has 13380 states and 15407 transitions. [2023-02-17 08:15:00,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.424242424242424) internal successors, (311), 32 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13380 states and 15407 transitions. [2023-02-17 08:15:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-17 08:15:00,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:15:00,475 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:15:00,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-17 08:15:00,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-17 08:15:00,681 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:15:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:15:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1850586310, now seen corresponding path program 2 times [2023-02-17 08:15:00,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:15:00,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629601991] [2023-02-17 08:15:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:15:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:15:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:15:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 685 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 08:15:01,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:15:01,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629601991] [2023-02-17 08:15:01,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629601991] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:15:01,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063016662] [2023-02-17 08:15:01,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:15:01,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:15:01,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:15:01,285 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:15:01,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-17 08:15:01,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:15:01,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:15:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 08:15:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:15:01,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:15:01,490 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:01,493 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:01,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:01,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:15:01,519 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 08:15:01,521 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 08:15:01,524 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 08:15:01,526 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 08:15:01,557 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 08:15:01,559 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 08:15:01,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:01,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 55 [2023-02-17 08:15:01,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:01,579 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 53 [2023-02-17 08:15:01,583 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 08:15:01,586 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 08:15:01,599 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-02-17 08:15:01,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:01,601 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 23 [2023-02-17 08:15:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 679 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 08:15:01,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:15:01,677 WARN L837 $PredicateComparison]: unable to prove that (or (<= 0 (+ 0 (- 1))) (<= 0 (- 1)) (let ((.cse0 (+ 4 c_~t4~0.offset))) (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~t4~0.base) .cse0) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~t4~0.base) .cse0) 0))))) is different from false [2023-02-17 08:15:01,686 WARN L837 $PredicateComparison]: unable to prove that (or (<= 0 (+ 0 (- 1))) (<= 0 (- 1)) (let ((.cse0 (+ 4 c_~S~0.offset))) (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~S~0.base) .cse0) 0))))) is different from false [2023-02-17 08:15:01,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:01,817 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:15:01,818 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 24 [2023-02-17 08:15:01,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 08:15:01,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:01,823 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:15:01,824 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:15:01,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-02-17 08:15:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 381 refuted. 0 times theorem prover too weak. 50 trivial. 308 not checked. [2023-02-17 08:15:01,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063016662] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:15:01,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:15:01,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2023-02-17 08:15:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15471413] [2023-02-17 08:15:01,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:15:01,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 08:15:01,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:15:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 08:15:01,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=409, Unknown=3, NotChecked=82, Total=552 [2023-02-17 08:15:01,894 INFO L87 Difference]: Start difference. First operand 13380 states and 15407 transitions. Second operand has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:07,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 08:15:08,124 WARN L837 $PredicateComparison]: unable to prove that (and (<= 0 c_~t1~0.base) (= c_~t4~0.offset 0) (or (<= 0 (+ 0 (- 1))) (<= 0 (- 1)) (let ((.cse0 (+ 4 c_~S~0.offset))) (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~S~0.base) .cse0) 0))))) (= 1 (select |c_#valid| c_~x1~0.base)) (= c_~t1~0.offset 0) (or (and (= c_~x4~0.offset 0) (= c_~x4~0.base 0)) (<= 0 (+ c_~t4~0.offset (- 1))) (<= c_~t4~0.offset (- 1))) (= c_~x1~0.offset 0) (<= c_~t1~0.base 0)) is different from false [2023-02-17 08:15:08,189 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (<= 0 (+ 0 (- 1)))) (.cse2 (<= 0 (- 1))) (.cse0 (+ 4 c_~S~0.offset)) (.cse4 (<= 0 (+ c_~t4~0.offset (- 1)))) (.cse5 (<= c_~t4~0.offset (- 1)))) (and (<= 0 c_~t1~0.base) (= c_~t4~0.offset 0) (or (and (forall ((v_~x1~0.base_34 Int)) (or (not (= 0 (select |c_#valid| v_~x1~0.base_34))) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1563) c_~S~0.base) .cse0) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= 0 (select |c_#valid| v_~x1~0.base_34))) (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1562) c_~S~0.base) .cse0) 0))))) .cse1 .cse2) (or .cse1 .cse2 (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~S~0.base) .cse0) 0)))) (or (let ((.cse3 (+ c_~t4~0.offset 4))) (and (= (select (select |c_#memory_$Pointer$.base| c_~t4~0.base) .cse3) 0) (= (select (select |c_#memory_$Pointer$.offset| c_~t4~0.base) .cse3) 0))) .cse4 .cse5) (= 1 (select |c_#valid| c_~x1~0.base)) (= c_~t1~0.offset 0) (or (and (= c_~x4~0.offset 0) (= c_~x4~0.base 0)) .cse4 .cse5) (= c_~x1~0.offset 0) (<= c_~t1~0.base 0))) is different from false [2023-02-17 08:15:12,294 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (<= 0 (+ 0 (- 1)))) (.cse2 (<= 0 (- 1))) (.cse0 (+ 4 c_~S~0.offset))) (and (<= 0 c_~t1~0.base) (= c_~t4~0.offset 0) (= c_~t4~0.base 0) (or (and (forall ((v_~x1~0.base_34 Int)) (or (not (= 0 (select |c_#valid| v_~x1~0.base_34))) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1563) c_~S~0.base) .cse0) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= 0 (select |c_#valid| v_~x1~0.base_34))) (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1562) c_~S~0.base) .cse0) 0))))) .cse1 .cse2) (or .cse1 .cse2 (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~S~0.base) .cse0) 0)))) (= 1 (select |c_#valid| c_~x1~0.base)) (= c_~t1~0.offset 0) (or (and (= c_~x4~0.offset 0) (= c_~x4~0.base 0)) (<= 0 (+ c_~t4~0.offset (- 1))) (<= c_~t4~0.offset (- 1))) (= c_~x1~0.offset 0) (<= c_~t1~0.base 0))) is different from false [2023-02-17 08:15:12,354 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 0 (+ 0 (- 1)))) (.cse1 (<= 0 (- 1)))) (and (<= 0 c_~t1~0.base) (or .cse0 .cse1 (let ((.cse2 (+ 4 c_~S~0.offset))) (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~S~0.base) .cse2) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~S~0.base) .cse2) 0))))) (= 1 (select |c_#valid| c_~x1~0.base)) (= c_~t1~0.offset 0) (or (and (= c_~x4~0.offset 0) (= c_~x4~0.base 0)) .cse0 .cse1) (= c_~x1~0.offset 0) (<= c_~t1~0.base 0))) is different from false [2023-02-17 08:15:12,412 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 0 (+ 0 (- 1)))) (.cse1 (<= 0 (- 1)))) (and (or .cse0 .cse1 (let ((.cse2 (+ 4 c_~t4~0.offset))) (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~t4~0.base) .cse2) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~t4~0.base) .cse2) 0))))) (or .cse0 (let ((.cse3 (+ 4 c_~x1~0.offset))) (and (forall ((v_~x1~0.base_34 Int)) (or (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1563) c_~x1~0.base) .cse3) 0)) (not (= 0 (select |c_#valid| v_~x1~0.base_34))))) (forall ((v_~x1~0.base_34 Int)) (or (not (= 0 (select |c_#valid| v_~x1~0.base_34))) (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1562) c_~x1~0.base) .cse3) 0)))))) .cse1))) is different from false [2023-02-17 08:15:12,638 WARN L837 $PredicateComparison]: unable to prove that (and (<= 0 c_~t1~0.base) (or (<= 0 (+ 0 (- 1))) (<= 0 (- 1)) (let ((.cse0 (+ 4 c_~S~0.offset))) (and (forall ((v_ArrVal_1562 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1562) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1563 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1563) c_~S~0.base) .cse0) 0))))) (= 1 (select |c_#valid| c_~x1~0.base)) (= c_~t1~0.offset 0) (= c_~x1~0.offset 0) (<= c_~t1~0.base 0)) is different from false [2023-02-17 08:15:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:15:13,557 INFO L93 Difference]: Finished difference Result 53505 states and 60779 transitions. [2023-02-17 08:15:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-02-17 08:15:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2023-02-17 08:15:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:15:13,615 INFO L225 Difference]: With dead ends: 53505 [2023-02-17 08:15:13,615 INFO L226 Difference]: Without dead ends: 53505 [2023-02-17 08:15:13,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 305 SyntacticMatches, 17 SemanticMatches, 211 ConstructedPredicates, 8 IntricatePredicates, 18 DeprecatedPredicates, 18499 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4818, Invalid=36946, Unknown=88, NotChecked=3304, Total=45156 [2023-02-17 08:15:13,620 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 3301 mSDsluCounter, 6508 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 204 mSolverCounterUnsat, 52 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3301 SdHoareTripleChecker+Valid, 6894 SdHoareTripleChecker+Invalid, 4356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 52 IncrementalHoareTripleChecker+Unknown, 1373 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:15:13,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3301 Valid, 6894 Invalid, 4356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2727 Invalid, 52 Unknown, 1373 Unchecked, 4.5s Time] [2023-02-17 08:15:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53505 states. [2023-02-17 08:15:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53505 to 21973. [2023-02-17 08:15:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21973 states, 21964 states have (on average 1.1503824439992716) internal successors, (25267), 21972 states have internal predecessors, (25267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21973 states to 21973 states and 25267 transitions. [2023-02-17 08:15:13,981 INFO L78 Accepts]: Start accepts. Automaton has 21973 states and 25267 transitions. Word has length 162 [2023-02-17 08:15:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:15:13,982 INFO L495 AbstractCegarLoop]: Abstraction has 21973 states and 25267 transitions. [2023-02-17 08:15:13,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 21973 states and 25267 transitions. [2023-02-17 08:15:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-17 08:15:13,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:15:13,990 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:15:13,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-17 08:15:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-17 08:15:14,197 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:15:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:15:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1229648570, now seen corresponding path program 3 times [2023-02-17 08:15:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:15:14,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180362899] [2023-02-17 08:15:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:15:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:15:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:15:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 681 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-17 08:15:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:15:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180362899] [2023-02-17 08:15:14,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180362899] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:15:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016344144] [2023-02-17 08:15:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:15:14,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:15:14,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:15:14,873 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:15:14,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-17 08:15:15,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-17 08:15:15,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:15:15,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-17 08:15:15,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:15:15,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:15:15,263 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:15,265 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:15,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:15,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:15:15,321 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2023-02-17 08:15:15,323 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:15:15,339 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2023-02-17 08:15:15,341 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:15:15,347 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2023-02-17 08:15:15,352 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:15:15,363 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2023-02-17 08:15:15,366 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-17 08:15:15,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:15,389 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 26 [2023-02-17 08:15:15,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:15,396 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 23 [2023-02-17 08:15:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 134 proven. 627 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-02-17 08:15:15,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:15:16,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:16,150 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:15:16,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:16,154 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 36 [2023-02-17 08:15:16,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 08:15:16,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:16,163 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:15:16,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:15:16,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:16,168 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 20 [2023-02-17 08:15:16,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:16,172 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 08:15:16,174 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:15:16,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:16,176 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 20 [2023-02-17 08:15:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 96 proven. 665 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-02-17 08:15:16,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016344144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:15:16,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:15:16,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2023-02-17 08:15:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315334692] [2023-02-17 08:15:16,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:15:16,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 08:15:16,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:15:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 08:15:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=884, Unknown=5, NotChecked=0, Total=992 [2023-02-17 08:15:16,294 INFO L87 Difference]: Start difference. First operand 21973 states and 25267 transitions. Second operand has 32 states, 32 states have (on average 9.59375) internal successors, (307), 31 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:15:29,723 INFO L93 Difference]: Finished difference Result 132594 states and 150678 transitions. [2023-02-17 08:15:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2023-02-17 08:15:29,723 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 9.59375) internal successors, (307), 31 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2023-02-17 08:15:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:15:29,855 INFO L225 Difference]: With dead ends: 132594 [2023-02-17 08:15:29,855 INFO L226 Difference]: Without dead ends: 132594 [2023-02-17 08:15:29,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 301 SyntacticMatches, 9 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29100 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=8359, Invalid=61017, Unknown=56, NotChecked=0, Total=69432 [2023-02-17 08:15:29,860 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 4085 mSDsluCounter, 6657 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 406 mSolverCounterUnsat, 93 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 7072 SdHoareTripleChecker+Invalid, 3800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 93 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:15:29,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4085 Valid, 7072 Invalid, 3800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 3301 Invalid, 93 Unknown, 0 Unchecked, 4.3s Time] [2023-02-17 08:15:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132594 states. [2023-02-17 08:15:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132594 to 58752. [2023-02-17 08:15:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58752 states, 58743 states have (on average 1.1472515874231823) internal successors, (67393), 58751 states have internal predecessors, (67393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58752 states to 58752 states and 67393 transitions. [2023-02-17 08:15:30,836 INFO L78 Accepts]: Start accepts. Automaton has 58752 states and 67393 transitions. Word has length 162 [2023-02-17 08:15:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:15:30,836 INFO L495 AbstractCegarLoop]: Abstraction has 58752 states and 67393 transitions. [2023-02-17 08:15:30,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.59375) internal successors, (307), 31 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 58752 states and 67393 transitions. [2023-02-17 08:15:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-02-17 08:15:30,846 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:15:30,846 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:15:30,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-17 08:15:31,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-17 08:15:31,046 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:15:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:15:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash -115562864, now seen corresponding path program 4 times [2023-02-17 08:15:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:15:31,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635281272] [2023-02-17 08:15:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:15:31,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:15:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:15:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 118 proven. 743 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-17 08:15:31,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:15:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635281272] [2023-02-17 08:15:31,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635281272] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:15:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117410045] [2023-02-17 08:15:31,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 08:15:31,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:15:31,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:15:31,630 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:15:31,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-17 08:15:31,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 08:15:31,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:15:31,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 08:15:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:15:31,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:15:31,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:31,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 28 [2023-02-17 08:15:31,855 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:31,915 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 21 [2023-02-17 08:15:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 765 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-17 08:15:31,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:15:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 98 proven. 749 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-17 08:15:32,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117410045] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:15:32,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:15:32,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2023-02-17 08:15:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369289911] [2023-02-17 08:15:32,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:15:32,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 08:15:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:15:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 08:15:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-02-17 08:15:32,087 INFO L87 Difference]: Start difference. First operand 58752 states and 67393 transitions. Second operand has 29 states, 28 states have (on average 9.892857142857142) internal successors, (277), 29 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:15:34,580 INFO L93 Difference]: Finished difference Result 216397 states and 246499 transitions. [2023-02-17 08:15:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-17 08:15:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 9.892857142857142) internal successors, (277), 29 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2023-02-17 08:15:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:15:35,038 INFO L225 Difference]: With dead ends: 216397 [2023-02-17 08:15:35,038 INFO L226 Difference]: Without dead ends: 216397 [2023-02-17 08:15:35,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 361 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1547, Invalid=5095, Unknown=0, NotChecked=0, Total=6642 [2023-02-17 08:15:35,039 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1712 mSDsluCounter, 3311 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:15:35,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1712 Valid, 3586 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-17 08:15:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216397 states. [2023-02-17 08:15:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216397 to 117998. [2023-02-17 08:15:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117998 states, 117989 states have (on average 1.1504631787709023) internal successors, (135742), 117997 states have internal predecessors, (135742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117998 states to 117998 states and 135742 transitions. [2023-02-17 08:15:36,632 INFO L78 Accepts]: Start accepts. Automaton has 117998 states and 135742 transitions. Word has length 173 [2023-02-17 08:15:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:15:36,632 INFO L495 AbstractCegarLoop]: Abstraction has 117998 states and 135742 transitions. [2023-02-17 08:15:36,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 9.892857142857142) internal successors, (277), 29 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 117998 states and 135742 transitions. [2023-02-17 08:15:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-02-17 08:15:36,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:15:36,643 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:15:36,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-17 08:15:36,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:15:36,849 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:15:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:15:36,850 INFO L85 PathProgramCache]: Analyzing trace with hash -115562863, now seen corresponding path program 1 times [2023-02-17 08:15:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:15:36,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501212622] [2023-02-17 08:15:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:15:36,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:15:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:15:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 117 proven. 744 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-17 08:15:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:15:37,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501212622] [2023-02-17 08:15:37,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501212622] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:15:37,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379711875] [2023-02-17 08:15:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:15:37,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:15:37,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:15:37,942 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:15:37,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-17 08:15:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:15:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 08:15:38,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:15:38,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:15:38,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:15:38,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:15:38,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:15:38,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-02-17 08:15:38,184 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:38,187 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:38,250 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 13 [2023-02-17 08:15:38,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2023-02-17 08:15:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 781 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-17 08:15:38,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:15:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 765 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-17 08:15:38,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379711875] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:15:38,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:15:38,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-02-17 08:15:38,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955401768] [2023-02-17 08:15:38,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:15:38,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 08:15:38,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:15:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 08:15:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2023-02-17 08:15:38,591 INFO L87 Difference]: Start difference. First operand 117998 states and 135742 transitions. Second operand has 32 states, 31 states have (on average 11.03225806451613) internal successors, (342), 32 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:15:49,120 INFO L93 Difference]: Finished difference Result 509069 states and 579528 transitions. [2023-02-17 08:15:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2023-02-17 08:15:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 11.03225806451613) internal successors, (342), 32 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2023-02-17 08:15:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:15:49,810 INFO L225 Difference]: With dead ends: 509069 [2023-02-17 08:15:49,811 INFO L226 Difference]: Without dead ends: 509069 [2023-02-17 08:15:49,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 533 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36602 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=17471, Invalid=66919, Unknown=0, NotChecked=0, Total=84390 [2023-02-17 08:15:49,815 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 5108 mSDsluCounter, 6706 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5108 SdHoareTripleChecker+Valid, 7156 SdHoareTripleChecker+Invalid, 3960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-17 08:15:49,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5108 Valid, 7156 Invalid, 3960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-17 08:15:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509069 states. [2023-02-17 08:15:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509069 to 211248. [2023-02-17 08:15:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211248 states, 211239 states have (on average 1.1488645562609177) internal successors, (242685), 211247 states have internal predecessors, (242685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211248 states to 211248 states and 242685 transitions. [2023-02-17 08:15:54,666 INFO L78 Accepts]: Start accepts. Automaton has 211248 states and 242685 transitions. Word has length 173 [2023-02-17 08:15:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:15:54,666 INFO L495 AbstractCegarLoop]: Abstraction has 211248 states and 242685 transitions. [2023-02-17 08:15:54,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 11.03225806451613) internal successors, (342), 32 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 211248 states and 242685 transitions. [2023-02-17 08:15:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-02-17 08:15:54,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:15:54,679 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:15:54,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-17 08:15:54,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-17 08:15:54,880 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:15:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:15:54,881 INFO L85 PathProgramCache]: Analyzing trace with hash -695935548, now seen corresponding path program 2 times [2023-02-17 08:15:54,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:15:54,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655330607] [2023-02-17 08:15:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:15:54,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:15:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:15:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 157 proven. 629 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 08:15:55,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:15:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655330607] [2023-02-17 08:15:55,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655330607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:15:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483688992] [2023-02-17 08:15:55,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:15:55,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:15:55,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:15:55,680 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:15:55,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-17 08:15:55,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:15:55,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:15:55,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 08:15:55,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:15:56,016 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:15:56,063 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2023-02-17 08:15:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 121 proven. 653 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-17 08:15:56,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:15:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 94 proven. 643 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-17 08:15:56,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483688992] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:15:56,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:15:56,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 27 [2023-02-17 08:15:56,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335326508] [2023-02-17 08:15:56,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:15:56,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 08:15:56,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:15:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 08:15:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-17 08:15:56,591 INFO L87 Difference]: Start difference. First operand 211248 states and 242685 transitions. Second operand has 27 states, 27 states have (on average 11.0) internal successors, (297), 27 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:15:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:15:58,845 INFO L93 Difference]: Finished difference Result 298599 states and 340418 transitions. [2023-02-17 08:15:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-17 08:15:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 11.0) internal successors, (297), 27 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2023-02-17 08:15:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:15:59,202 INFO L225 Difference]: With dead ends: 298599 [2023-02-17 08:15:59,203 INFO L226 Difference]: Without dead ends: 298599 [2023-02-17 08:15:59,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 303 SyntacticMatches, 87 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5987 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2525, Invalid=9685, Unknown=0, NotChecked=0, Total=12210 [2023-02-17 08:15:59,204 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 1286 mSDsluCounter, 2548 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:15:59,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 2787 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 08:15:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298599 states. [2023-02-17 08:16:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298599 to 210877. [2023-02-17 08:16:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210877 states, 210868 states have (on average 1.148372441527401) internal successors, (242155), 210876 states have internal predecessors, (242155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210877 states to 210877 states and 242155 transitions. [2023-02-17 08:16:02,247 INFO L78 Accepts]: Start accepts. Automaton has 210877 states and 242155 transitions. Word has length 174 [2023-02-17 08:16:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:02,249 INFO L495 AbstractCegarLoop]: Abstraction has 210877 states and 242155 transitions. [2023-02-17 08:16:02,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 11.0) internal successors, (297), 27 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 210877 states and 242155 transitions. [2023-02-17 08:16:02,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-02-17 08:16:02,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:02,256 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:16:02,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-17 08:16:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:16:02,457 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:16:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1469366084, now seen corresponding path program 3 times [2023-02-17 08:16:02,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:02,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846586851] [2023-02-17 08:16:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:02,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 531 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-17 08:16:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:02,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846586851] [2023-02-17 08:16:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846586851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:16:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578538585] [2023-02-17 08:16:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:16:02,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:16:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:16:02,593 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:16:02,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-17 08:16:02,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-17 08:16:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:16:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 08:16:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:16:02,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:16:02,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:02,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:16:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-17 08:16:02,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:16:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-17 08:16:02,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578538585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:16:02,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:16:02,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-02-17 08:16:02,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938907066] [2023-02-17 08:16:02,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:16:02,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:16:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:02,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:16:02,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:16:02,857 INFO L87 Difference]: Start difference. First operand 210877 states and 242155 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:03,816 INFO L93 Difference]: Finished difference Result 287168 states and 327898 transitions. [2023-02-17 08:16:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:16:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2023-02-17 08:16:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:04,161 INFO L225 Difference]: With dead ends: 287168 [2023-02-17 08:16:04,161 INFO L226 Difference]: Without dead ends: 287168 [2023-02-17 08:16:04,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-02-17 08:16:04,161 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 342 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:04,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 665 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:16:04,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287168 states. [2023-02-17 08:16:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287168 to 246238. [2023-02-17 08:16:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246238 states, 246229 states have (on average 1.144134119051777) internal successors, (281719), 246237 states have internal predecessors, (281719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246238 states to 246238 states and 281719 transitions. [2023-02-17 08:16:07,434 INFO L78 Accepts]: Start accepts. Automaton has 246238 states and 281719 transitions. Word has length 174 [2023-02-17 08:16:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:07,434 INFO L495 AbstractCegarLoop]: Abstraction has 246238 states and 281719 transitions. [2023-02-17 08:16:07,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 246238 states and 281719 transitions. [2023-02-17 08:16:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-02-17 08:16:07,443 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:07,443 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:16:07,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-17 08:16:07,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:16:07,644 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:16:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2129791236, now seen corresponding path program 4 times [2023-02-17 08:16:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:07,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716790512] [2023-02-17 08:16:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 523 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-17 08:16:07,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:07,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716790512] [2023-02-17 08:16:07,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716790512] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:16:07,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024630602] [2023-02-17 08:16:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 08:16:07,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:16:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:16:07,782 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:16:07,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-17 08:16:08,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 08:16:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:16:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 08:16:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:16:08,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:16:08,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:08,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:16:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-17 08:16:08,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:16:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-17 08:16:08,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024630602] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:16:08,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:16:08,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-02-17 08:16:08,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479313379] [2023-02-17 08:16:08,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:16:08,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 08:16:08,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 08:16:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:16:08,061 INFO L87 Difference]: Start difference. First operand 246238 states and 281719 transitions. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:09,096 INFO L93 Difference]: Finished difference Result 315075 states and 359364 transitions. [2023-02-17 08:16:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:16:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2023-02-17 08:16:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:09,480 INFO L225 Difference]: With dead ends: 315075 [2023-02-17 08:16:09,480 INFO L226 Difference]: Without dead ends: 315075 [2023-02-17 08:16:09,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 348 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-02-17 08:16:09,481 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 373 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:09,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 628 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:16:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315075 states. [2023-02-17 08:16:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315075 to 191940. [2023-02-17 08:16:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191940 states, 191931 states have (on average 1.1476676513955537) internal successors, (220273), 191939 states have internal predecessors, (220273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191940 states to 191940 states and 220273 transitions. [2023-02-17 08:16:12,271 INFO L78 Accepts]: Start accepts. Automaton has 191940 states and 220273 transitions. Word has length 174 [2023-02-17 08:16:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:12,271 INFO L495 AbstractCegarLoop]: Abstraction has 191940 states and 220273 transitions. [2023-02-17 08:16:12,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 191940 states and 220273 transitions. [2023-02-17 08:16:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-17 08:16:12,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:12,280 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 7, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:16:12,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-17 08:16:12,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-17 08:16:12,480 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:16:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -668697579, now seen corresponding path program 1 times [2023-02-17 08:16:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:12,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141193987] [2023-02-17 08:16:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 500 proven. 2 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-02-17 08:16:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141193987] [2023-02-17 08:16:12,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141193987] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:16:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532655159] [2023-02-17 08:16:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:12,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:16:12,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:16:12,639 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:16:12,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-17 08:16:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:12,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 08:16:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:16:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-02-17 08:16:12,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:16:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-02-17 08:16:12,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532655159] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:16:12,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:16:12,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-02-17 08:16:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318715248] [2023-02-17 08:16:12,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:16:12,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:16:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:16:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:16:12,906 INFO L87 Difference]: Start difference. First operand 191940 states and 220273 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:13,091 INFO L93 Difference]: Finished difference Result 31179 states and 35615 transitions. [2023-02-17 08:16:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:16:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2023-02-17 08:16:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:13,121 INFO L225 Difference]: With dead ends: 31179 [2023-02-17 08:16:13,121 INFO L226 Difference]: Without dead ends: 31179 [2023-02-17 08:16:13,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 353 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-02-17 08:16:13,122 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 409 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:13,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 966 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:16:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31179 states. [2023-02-17 08:16:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31179 to 12167. [2023-02-17 08:16:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12167 states, 12158 states have (on average 1.1321763447935516) internal successors, (13765), 12166 states have internal predecessors, (13765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12167 states to 12167 states and 13765 transitions. [2023-02-17 08:16:13,624 INFO L78 Accepts]: Start accepts. Automaton has 12167 states and 13765 transitions. Word has length 178 [2023-02-17 08:16:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 12167 states and 13765 transitions. [2023-02-17 08:16:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12167 states and 13765 transitions. [2023-02-17 08:16:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-02-17 08:16:13,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:13,628 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:16:13,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-17 08:16:13,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-17 08:16:13,829 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:16:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1498211354, now seen corresponding path program 5 times [2023-02-17 08:16:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882999763] [2023-02-17 08:16:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 287 proven. 799 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-17 08:16:14,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:14,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882999763] [2023-02-17 08:16:14,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882999763] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:16:14,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516981578] [2023-02-17 08:16:14,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 08:16:14,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:16:14,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:16:14,693 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:16:14,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-17 08:16:16,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-17 08:16:16,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:16:16,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 08:16:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:16:16,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:16:16,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:16,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 31 [2023-02-17 08:16:16,230 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:16:16,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:16,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 101 [2023-02-17 08:16:16,271 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 46 [2023-02-17 08:16:16,277 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 46 [2023-02-17 08:16:16,305 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-02-17 08:16:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 262 proven. 828 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-17 08:16:16,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:16:16,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:16,605 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-02-17 08:16:16,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2023-02-17 08:16:16,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-02-17 08:16:16,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:16,616 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-02-17 08:16:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2023-02-17 08:16:16,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-02-17 08:16:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 231 proven. 880 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-17 08:16:19,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516981578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:16:19,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:16:19,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 15] total 36 [2023-02-17 08:16:19,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035235164] [2023-02-17 08:16:19,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:16:19,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-17 08:16:19,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-17 08:16:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1183, Unknown=1, NotChecked=0, Total=1332 [2023-02-17 08:16:19,427 INFO L87 Difference]: Start difference. First operand 12167 states and 13765 transitions. Second operand has 37 states, 36 states have (on average 9.083333333333334) internal successors, (327), 37 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:22,491 INFO L93 Difference]: Finished difference Result 24414 states and 27424 transitions. [2023-02-17 08:16:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-17 08:16:22,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 9.083333333333334) internal successors, (327), 37 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2023-02-17 08:16:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:22,512 INFO L225 Difference]: With dead ends: 24414 [2023-02-17 08:16:22,512 INFO L226 Difference]: Without dead ends: 24414 [2023-02-17 08:16:22,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 401 SyntacticMatches, 14 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2898 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2494, Invalid=8011, Unknown=1, NotChecked=0, Total=10506 [2023-02-17 08:16:22,514 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 2045 mSDsluCounter, 4716 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2045 SdHoareTripleChecker+Valid, 5096 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:22,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2045 Valid, 5096 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2687 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2023-02-17 08:16:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24414 states. [2023-02-17 08:16:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24414 to 11843. [2023-02-17 08:16:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11843 states, 11834 states have (on average 1.1301335136048674) internal successors, (13374), 11842 states have internal predecessors, (13374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11843 states to 11843 states and 13374 transitions. [2023-02-17 08:16:22,641 INFO L78 Accepts]: Start accepts. Automaton has 11843 states and 13374 transitions. Word has length 192 [2023-02-17 08:16:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:22,641 INFO L495 AbstractCegarLoop]: Abstraction has 11843 states and 13374 transitions. [2023-02-17 08:16:22,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 9.083333333333334) internal successors, (327), 37 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 11843 states and 13374 transitions. [2023-02-17 08:16:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-02-17 08:16:22,645 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:22,645 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:16:22,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-17 08:16:22,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-17 08:16:22,846 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-02-17 08:16:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1867130138, now seen corresponding path program 6 times [2023-02-17 08:16:22,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:22,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853071869] [2023-02-17 08:16:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:22,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 285 proven. 803 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-02-17 08:16:23,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853071869] [2023-02-17 08:16:23,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853071869] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:16:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066583181] [2023-02-17 08:16:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 08:16:23,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:16:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:16:23,606 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:16:23,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-17 08:16:23,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-17 08:16:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:16:23,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 08:16:23,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:16:23,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:16:24,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:24,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 28 [2023-02-17 08:16:24,054 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-17 08:16:24,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:24,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 109 [2023-02-17 08:16:24,114 INFO L350 Elim1Store]: Elim1 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 118 treesize of output 96 [2023-02-17 08:16:24,143 INFO L350 Elim1Store]: Elim1 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 118 treesize of output 96 [2023-02-17 08:16:24,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:24,499 INFO L350 Elim1Store]: Elim1 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 565 treesize of output 417 [2023-02-17 08:16:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 408 proven. 702 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-17 08:16:25,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:16:25,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:16:25,532 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-02-17 08:16:25,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2023-02-17 08:16:25,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-02-17 08:16:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 225 proven. 885 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-17 08:16:25,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066583181] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:16:25,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:16:25,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 38 [2023-02-17 08:16:25,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256368127] [2023-02-17 08:16:25,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:16:25,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-17 08:16:25,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:25,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-17 08:16:25,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1311, Unknown=1, NotChecked=0, Total=1482 [2023-02-17 08:16:25,952 INFO L87 Difference]: Start difference. First operand 11843 states and 13374 transitions. Second operand has 39 states, 38 states have (on average 9.31578947368421) internal successors, (354), 39 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)