./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e8d55036 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/960521-1-3.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 c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:50:23,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:50:23,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:50:23,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:50:23,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:50:23,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:50:23,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:50:23,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:50:23,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:50:23,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:50:23,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:50:23,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:50:23,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:50:23,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:50:23,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:50:23,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:50:23,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:50:23,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:50:23,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:50:23,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:50:23,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:50:23,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:50:23,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:50:23,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:50:23,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:50:23,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:50:23,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:50:23,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:50:23,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:50:23,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:50:23,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:50:23,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:50:23,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:50:23,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:50:23,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:50:23,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:50:23,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:50:23,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:50:23,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:50:23,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:50:23,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:50:23,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 21:50:23,589 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:50:23,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:50:23,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:50:23,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:50:23,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:50:23,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:50:23,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:50:23,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:50:23,591 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:50:23,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:50:23,592 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:50:23,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 21:50:23,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:50:23,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:50:23,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:50:23,593 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 21:50:23,593 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 21:50:23,594 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 21:50:23,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:50:23,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 21:50:23,594 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:50:23,594 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:50:23,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:50:23,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:50:23,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:50:23,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:50:23,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:50:23,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:50:23,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:50:23,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:50:23,596 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:50:23,596 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:50:23,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:50:23,596 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:50:23,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b [2023-02-15 21:50:23,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:50:23,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:50:23,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:50:23,836 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:50:23,836 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:50:23,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-3.i [2023-02-15 21:50:24,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:50:25,201 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:50:25,205 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-3.i [2023-02-15 21:50:25,222 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56412289/7a59a3e922654981b97d52caaeffb3f7/FLAG355e78c13 [2023-02-15 21:50:25,232 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56412289/7a59a3e922654981b97d52caaeffb3f7 [2023-02-15 21:50:25,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:50:25,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:50:25,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:50:25,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:50:25,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:50:25,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f21c221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25, skipping insertion in model container [2023-02-15 21:50:25,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:50:25,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:50:25,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:50:25,529 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:50:25,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:50:25,574 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:50:25,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25 WrapperNode [2023-02-15 21:50:25,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:50:25,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:50:25,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:50:25,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:50:25,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,611 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-15 21:50:25,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:50:25,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:50:25,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:50:25,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:50:25,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,630 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:50:25,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:50:25,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:50:25,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:50:25,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (1/1) ... [2023-02-15 21:50:25,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:50:25,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:25,679 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) [2023-02-15 21:50:25,696 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 [2023-02-15 21:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 21:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 21:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 21:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:50:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 21:50:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:50:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:50:25,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:50:25,838 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:50:25,839 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:50:26,023 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:50:26,029 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:50:26,029 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 21:50:26,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:50:26 BoogieIcfgContainer [2023-02-15 21:50:26,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:50:26,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:50:26,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:50:26,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:50:26,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:50:25" (1/3) ... [2023-02-15 21:50:26,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d99a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:50:26, skipping insertion in model container [2023-02-15 21:50:26,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:50:25" (2/3) ... [2023-02-15 21:50:26,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d99a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:50:26, skipping insertion in model container [2023-02-15 21:50:26,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:50:26" (3/3) ... [2023-02-15 21:50:26,043 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2023-02-15 21:50:26,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:50:26,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-02-15 21:50:26,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:50:26,094 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;@29e7b50d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:50:26,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-02-15 21:50:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:50:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 21:50:26,100 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:26,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 21:50:26,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-15 21:50:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:26,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799841076] [2023-02-15 21:50:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:26,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:26,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799841076] [2023-02-15 21:50:26,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799841076] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:50:26,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:50:26,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:50:26,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366290824] [2023-02-15 21:50:26,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:50:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 21:50:26,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:26,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 21:50:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 21:50:26,305 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 21:50:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:26,339 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-15 21:50:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 21:50:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-02-15 21:50:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:26,346 INFO L225 Difference]: With dead ends: 50 [2023-02-15 21:50:26,346 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 21:50:26,347 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 [2023-02-15 21:50:26,350 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:26,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:50:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 21:50:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-15 21:50:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 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) [2023-02-15 21:50:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-15 21:50:26,372 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2023-02-15 21:50:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:26,373 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-15 21:50:26,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 21:50:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-15 21:50:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 21:50:26,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:26,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 21:50:26,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:50:26,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-15 21:50:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:26,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873555644] [2023-02-15 21:50:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:26,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:26,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873555644] [2023-02-15 21:50:26,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873555644] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:50:26,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:50:26,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:50:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115482248] [2023-02-15 21:50:26,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:50:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 21:50:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 21:50:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 21:50:26,499 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 21:50:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:26,513 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-02-15 21:50:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 21:50:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-02-15 21:50:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:26,515 INFO L225 Difference]: With dead ends: 47 [2023-02-15 21:50:26,515 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 21:50:26,515 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 [2023-02-15 21:50:26,516 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:26,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:50:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 21:50:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-15 21:50:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 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) [2023-02-15 21:50:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-02-15 21:50:26,520 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2023-02-15 21:50:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:26,520 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-02-15 21:50:26,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 21:50:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-02-15 21:50:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 21:50:26,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:26,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 21:50:26,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:50:26,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2023-02-15 21:50:26,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:26,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532635882] [2023-02-15 21:50:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:26,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:26,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532635882] [2023-02-15 21:50:26,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532635882] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:50:26,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:50:26,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:50:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844235896] [2023-02-15 21:50:26,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:50:26,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:50:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:26,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:50:26,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:50:26,599 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 21:50:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:26,628 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-15 21:50:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 21:50:26,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-02-15 21:50:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:26,629 INFO L225 Difference]: With dead ends: 44 [2023-02-15 21:50:26,629 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 21:50:26,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:50:26,630 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:26,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:50:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 21:50:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 21:50:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 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) [2023-02-15 21:50:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-02-15 21:50:26,634 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2023-02-15 21:50:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:26,634 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-02-15 21:50:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 21:50:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-02-15 21:50:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 21:50:26,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:26,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 21:50:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 21:50:26,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2023-02-15 21:50:26,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:26,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564204833] [2023-02-15 21:50:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:26,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:26,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:26,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564204833] [2023-02-15 21:50:26,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564204833] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:50:26,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:50:26,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:50:26,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082609942] [2023-02-15 21:50:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:50:26,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:50:26,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:50:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:50:26,795 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2023-02-15 21:50:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:26,885 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-02-15 21:50:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:50:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2023-02-15 21:50:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:26,887 INFO L225 Difference]: With dead ends: 51 [2023-02-15 21:50:26,888 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 21:50:26,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:50:26,895 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:26,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 64 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:50:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 21:50:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-02-15 21:50:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 44 states have internal predecessors, (48), 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) [2023-02-15 21:50:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-02-15 21:50:26,906 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 6 [2023-02-15 21:50:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:26,907 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-02-15 21:50:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2023-02-15 21:50:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-02-15 21:50:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 21:50:26,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:26,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:26,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:50:26,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash 59362067, now seen corresponding path program 1 times [2023-02-15 21:50:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:26,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597881131] [2023-02-15 21:50:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:26,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:26,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597881131] [2023-02-15 21:50:26,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597881131] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:50:26,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:50:26,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:50:26,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462599877] [2023-02-15 21:50:26,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:50:26,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:50:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:50:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:50:26,986 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-02-15 21:50:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:27,014 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-02-15 21:50:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:50:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2023-02-15 21:50:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:27,017 INFO L225 Difference]: With dead ends: 50 [2023-02-15 21:50:27,017 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 21:50:27,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:50:27,018 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:27,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:50:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 21:50:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2023-02-15 21:50:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 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) [2023-02-15 21:50:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-02-15 21:50:27,028 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 8 [2023-02-15 21:50:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:27,031 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-02-15 21:50:27,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-02-15 21:50:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-02-15 21:50:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 21:50:27,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:27,032 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:27,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 21:50:27,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:27,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2023-02-15 21:50:27,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191204769] [2023-02-15 21:50:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:27,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191204769] [2023-02-15 21:50:27,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191204769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358608594] [2023-02-15 21:50:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:27,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:27,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:27,404 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) [2023-02-15 21:50:27,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:50:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 21:50:27,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:27,521 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 21:50:27,521 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 21:50:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:27,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:27,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358608594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:27,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:27,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-02-15 21:50:27,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721928613] [2023-02-15 21:50:27,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:27,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:50:27,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:27,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:50:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:50:27,694 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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) [2023-02-15 21:50:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:27,929 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-02-15 21:50:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:50:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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 [2023-02-15 21:50:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:27,931 INFO L225 Difference]: With dead ends: 67 [2023-02-15 21:50:27,931 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 21:50:27,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:50:27,932 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 185 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:27,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 103 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:50:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 21:50:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-02-15 21:50:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.5) internal successors, (69), 59 states have internal predecessors, (69), 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) [2023-02-15 21:50:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-02-15 21:50:27,936 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 9 [2023-02-15 21:50:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:27,936 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-02-15 21:50:27,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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) [2023-02-15 21:50:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-02-15 21:50:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 21:50:27,937 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:27,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:27,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:28,142 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,SelfDestructingSolverStorable5 [2023-02-15 21:50:28,143 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2023-02-15 21:50:28,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:28,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201813739] [2023-02-15 21:50:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:28,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:50:28,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201813739] [2023-02-15 21:50:28,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201813739] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:50:28,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:50:28,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:50:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472283706] [2023-02-15 21:50:28,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:50:28,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:50:28,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:50:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:50:28,174 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:50:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:28,202 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-02-15 21:50:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:50:28,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 21:50:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:28,204 INFO L225 Difference]: With dead ends: 58 [2023-02-15 21:50:28,204 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 21:50:28,204 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 [2023-02-15 21:50:28,205 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:28,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:50:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 21:50:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-15 21:50:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 57 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) [2023-02-15 21:50:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-02-15 21:50:28,212 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 11 [2023-02-15 21:50:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:28,212 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-02-15 21:50:28,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:50:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-02-15 21:50:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 21:50:28,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:28,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:28,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 21:50:28,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2023-02-15 21:50:28,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:28,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582774883] [2023-02-15 21:50:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:28,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:28,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:28,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582774883] [2023-02-15 21:50:28,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582774883] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:28,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025079364] [2023-02-15 21:50:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:28,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:28,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:28,299 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) [2023-02-15 21:50:28,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:50:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 21:50:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:28,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025079364] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:28,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:28,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-15 21:50:28,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351992929] [2023-02-15 21:50:28,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:50:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:50:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:50:28,415 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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) [2023-02-15 21:50:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:28,466 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-02-15 21:50:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:50:28,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 21:50:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:28,467 INFO L225 Difference]: With dead ends: 60 [2023-02-15 21:50:28,467 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 21:50:28,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:50:28,468 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:28,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 87 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:50:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 21:50:28,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-02-15 21:50:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 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) [2023-02-15 21:50:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-02-15 21:50:28,485 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 11 [2023-02-15 21:50:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:28,485 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-02-15 21:50:28,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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) [2023-02-15 21:50:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-02-15 21:50:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 21:50:28,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:28,486 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2023-02-15 21:50:28,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:28,691 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,SelfDestructingSolverStorable7 [2023-02-15 21:50:28,692 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2023-02-15 21:50:28,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:28,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767207857] [2023-02-15 21:50:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:29,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767207857] [2023-02-15 21:50:29,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767207857] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:29,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099315280] [2023-02-15 21:50:29,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:50:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:29,097 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) [2023-02-15 21:50:29,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:50:29,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:50:29,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:50:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 21:50:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:29,166 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-15 21:50:29,167 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 1 case distinctions, treesize of input 17 treesize of output 19 [2023-02-15 21:50:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:29,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:30,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099315280] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:30,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:30,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-02-15 21:50:30,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706588862] [2023-02-15 21:50:30,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:30,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 21:50:30,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 21:50:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-02-15 21:50:30,011 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 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) [2023-02-15 21:50:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:30,591 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2023-02-15 21:50:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:50:30,592 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 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 18 [2023-02-15 21:50:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:30,593 INFO L225 Difference]: With dead ends: 103 [2023-02-15 21:50:30,593 INFO L226 Difference]: Without dead ends: 103 [2023-02-15 21:50:30,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:50:30,594 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 369 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:30,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 157 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:50:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-15 21:50:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2023-02-15 21:50:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 67 states have internal predecessors, (74), 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) [2023-02-15 21:50:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-02-15 21:50:30,596 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 18 [2023-02-15 21:50:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:30,596 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-02-15 21:50:30,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 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) [2023-02-15 21:50:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-02-15 21:50:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 21:50:30,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:30,597 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:30,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:30,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:30,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1502042668, now seen corresponding path program 2 times [2023-02-15 21:50:30,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:30,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008434728] [2023-02-15 21:50:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:30,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:50:30,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008434728] [2023-02-15 21:50:30,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008434728] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:30,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463678410] [2023-02-15 21:50:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:50:30,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:30,898 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) [2023-02-15 21:50:30,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:50:30,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 21:50:30,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:50:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 21:50:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:30,959 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 21:50:30,959 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 21:50:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 21:50:31,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:50:31,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463678410] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:50:31,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:50:31,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2023-02-15 21:50:31,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072626553] [2023-02-15 21:50:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:50:31,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:50:31,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:50:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:50:31,029 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:50:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:31,051 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-15 21:50:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:50:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 21:50:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:31,052 INFO L225 Difference]: With dead ends: 44 [2023-02-15 21:50:31,052 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 21:50:31,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:50:31,053 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:31,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:50:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 21:50:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 21:50:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 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) [2023-02-15 21:50:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-02-15 21:50:31,055 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2023-02-15 21:50:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:31,055 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-02-15 21:50:31,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:50:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-02-15 21:50:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:50:31,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:31,056 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:31,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:31,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 1 times [2023-02-15 21:50:31,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:31,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70764240] [2023-02-15 21:50:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:50:31,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:31,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70764240] [2023-02-15 21:50:31,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70764240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:31,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649777701] [2023-02-15 21:50:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:31,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:31,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:31,387 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) [2023-02-15 21:50:31,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:50:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 21:50:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:50:31,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:50:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649777701] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:31,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:31,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-02-15 21:50:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930665786] [2023-02-15 21:50:31,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 21:50:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 21:50:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2023-02-15 21:50:31,648 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 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) [2023-02-15 21:50:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:31,988 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2023-02-15 21:50:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:50:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 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 29 [2023-02-15 21:50:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:31,989 INFO L225 Difference]: With dead ends: 121 [2023-02-15 21:50:31,989 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 21:50:31,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2023-02-15 21:50:31,990 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 267 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:31,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 32 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:50:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 21:50:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 74. [2023-02-15 21:50:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 73 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) [2023-02-15 21:50:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2023-02-15 21:50:31,992 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 29 [2023-02-15 21:50:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:31,993 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2023-02-15 21:50:31,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 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) [2023-02-15 21:50:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2023-02-15 21:50:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 21:50:31,995 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:31,995 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:32,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:32,200 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,SelfDestructingSolverStorable10 [2023-02-15 21:50:32,200 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash -248790283, now seen corresponding path program 2 times [2023-02-15 21:50:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345579731] [2023-02-15 21:50:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:50:32,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345579731] [2023-02-15 21:50:32,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345579731] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619763739] [2023-02-15 21:50:32,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:50:32,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:32,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:32,521 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) [2023-02-15 21:50:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:50:32,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:50:32,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:50:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:50:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:50:32,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:50:33,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619763739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:33,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:33,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2023-02-15 21:50:33,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078734643] [2023-02-15 21:50:33,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:33,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 21:50:33,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 21:50:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 21:50:33,204 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 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) [2023-02-15 21:50:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:33,795 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2023-02-15 21:50:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 21:50:33,796 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 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 53 [2023-02-15 21:50:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:33,797 INFO L225 Difference]: With dead ends: 257 [2023-02-15 21:50:33,797 INFO L226 Difference]: Without dead ends: 257 [2023-02-15 21:50:33,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 21:50:33,799 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 536 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:33,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 49 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:50:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-15 21:50:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 146. [2023-02-15 21:50:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 145 states have internal predecessors, (160), 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) [2023-02-15 21:50:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2023-02-15 21:50:33,802 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 53 [2023-02-15 21:50:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:33,802 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2023-02-15 21:50:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 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) [2023-02-15 21:50:33,802 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2023-02-15 21:50:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 21:50:33,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:33,803 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:33,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 21:50:34,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:34,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2038312715, now seen corresponding path program 3 times [2023-02-15 21:50:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:34,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535927955] [2023-02-15 21:50:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:34,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:50:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535927955] [2023-02-15 21:50:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535927955] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795111605] [2023-02-15 21:50:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:50:34,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:34,845 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) [2023-02-15 21:50:34,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:50:34,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 21:50:34,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:50:34,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 21:50:34,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:34,982 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 10 treesize of output 8 [2023-02-15 21:50:34,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 11 [2023-02-15 21:50:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2023-02-15 21:50:36,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2023-02-15 21:50:36,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795111605] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:36,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:36,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 7, 7] total 46 [2023-02-15 21:50:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387962115] [2023-02-15 21:50:36,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:36,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 21:50:36,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:36,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 21:50:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=1422, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 21:50:36,837 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 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) [2023-02-15 21:50:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:45,932 INFO L93 Difference]: Finished difference Result 276 states and 277 transitions. [2023-02-15 21:50:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-02-15 21:50:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 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 101 [2023-02-15 21:50:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:45,934 INFO L225 Difference]: With dead ends: 276 [2023-02-15 21:50:45,934 INFO L226 Difference]: Without dead ends: 276 [2023-02-15 21:50:45,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9140 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=7833, Invalid=20559, Unknown=0, NotChecked=0, Total=28392 [2023-02-15 21:50:45,943 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:45,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 27 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:50:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-15 21:50:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 149. [2023-02-15 21:50:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.08843537414966) internal successors, (160), 148 states have internal predecessors, (160), 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) [2023-02-15 21:50:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2023-02-15 21:50:45,947 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 101 [2023-02-15 21:50:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:45,948 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2023-02-15 21:50:45,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 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) [2023-02-15 21:50:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2023-02-15 21:50:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-15 21:50:45,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:45,952 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:45,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 21:50:46,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:46,157 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 396849146, now seen corresponding path program 4 times [2023-02-15 21:50:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:46,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347090908] [2023-02-15 21:50:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:46,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:50:47,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347090908] [2023-02-15 21:50:47,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347090908] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638912479] [2023-02-15 21:50:47,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:50:47,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:47,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:47,075 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) [2023-02-15 21:50:47,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:50:48,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:50:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:50:48,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 21:50:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:50:48,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:50:49,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638912479] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:49,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:49,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 100 [2023-02-15 21:50:49,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118405336] [2023-02-15 21:50:49,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:49,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-02-15 21:50:49,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-02-15 21:50:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4359, Invalid=5541, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 21:50:49,989 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 100 states, 100 states have (on average 2.95) internal successors, (295), 100 states have internal predecessors, (295), 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) [2023-02-15 21:50:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:51,859 INFO L93 Difference]: Finished difference Result 543 states and 544 transitions. [2023-02-15 21:50:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 21:50:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.95) internal successors, (295), 100 states have internal predecessors, (295), 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 113 [2023-02-15 21:50:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:51,861 INFO L225 Difference]: With dead ends: 543 [2023-02-15 21:50:51,862 INFO L226 Difference]: Without dead ends: 543 [2023-02-15 21:50:51,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6205 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6567, Invalid=10725, Unknown=0, NotChecked=0, Total=17292 [2023-02-15 21:50:51,864 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1596 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:51,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1596 Valid, 87 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:50:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-02-15 21:50:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 299. [2023-02-15 21:50:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.101010101010101) internal successors, (327), 298 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) [2023-02-15 21:50:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 327 transitions. [2023-02-15 21:50:51,869 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 327 transitions. Word has length 113 [2023-02-15 21:50:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:51,870 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 327 transitions. [2023-02-15 21:50:51,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.95) internal successors, (295), 100 states have internal predecessors, (295), 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) [2023-02-15 21:50:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 327 transitions. [2023-02-15 21:50:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-02-15 21:50:51,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:51,871 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:51,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:52,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 21:50:52,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-15 21:50:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:52,079 INFO L85 PathProgramCache]: Analyzing trace with hash 293170132, now seen corresponding path program 5 times [2023-02-15 21:50:52,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:52,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038199367] [2023-02-15 21:50:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:52,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:50:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038199367] [2023-02-15 21:50:54,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038199367] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398914221] [2023-02-15 21:50:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:50:54,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:54,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:54,497 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) [2023-02-15 21:50:54,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process