./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/array-memsafety/cstrpbrk-alloca-2.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 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:19:50,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:19:50,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:19:50,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:19:50,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:19:50,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:19:50,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:19:50,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:19:50,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:19:50,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:19:50,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:19:50,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:19:50,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:19:50,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:19:50,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:19:50,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:19:50,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:19:50,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:19:50,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:19:50,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:19:50,506 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:19:50,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:19:50,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:19:50,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:19:50,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:19:50,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:19:50,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:19:50,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:19:50,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:19:50,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:19:50,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:19:50,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:19:50,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:19:50,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:19:50,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:19:50,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:19:50,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:19:50,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:19:50,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:19:50,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:19:50,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:19:50,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:19:50,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:19:50,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:19:50,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:19:50,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:19:50,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:19:50,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:19:50,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:19:50,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:19:50,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:19:50,558 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:19:50,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:19:50,560 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:19:50,560 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:19:50,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:19:50,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:19:50,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:19:50,561 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:19:50,561 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:19:50,561 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:19:50,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:19:50,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:19:50,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:19:50,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:19:50,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:19:50,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:19:50,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:19:50,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:19:50,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:19:50,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:19:50,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:19:50,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:19:50,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2022-07-20 05:19:50,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:19:50,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:19:50,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:19:50,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:19:50,823 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:19:50,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-07-20 05:19:50,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8060fc7b/321eb2a1adc0467090eb24d0ec5caca2/FLAG0f690c127 [2022-07-20 05:19:51,379 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:19:51,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-07-20 05:19:51,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8060fc7b/321eb2a1adc0467090eb24d0ec5caca2/FLAG0f690c127 [2022-07-20 05:19:51,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8060fc7b/321eb2a1adc0467090eb24d0ec5caca2 [2022-07-20 05:19:51,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:19:51,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:19:51,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:19:51,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:19:51,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:19:51,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:19:51" (1/1) ... [2022-07-20 05:19:51,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@120dcd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:51, skipping insertion in model container [2022-07-20 05:19:51,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:19:51" (1/1) ... [2022-07-20 05:19:51,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:19:51,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:19:52,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:19:52,053 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:19:52,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:19:52,109 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:19:52,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52 WrapperNode [2022-07-20 05:19:52,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:19:52,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:19:52,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:19:52,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:19:52,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,174 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2022-07-20 05:19:52,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:19:52,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:19:52,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:19:52,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:19:52,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:19:52,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:19:52,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:19:52,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:19:52,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (1/1) ... [2022-07-20 05:19:52,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:19:52,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:52,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 05:19:52,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 05:19:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:19:52,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:19:52,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:19:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:19:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:19:52,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:19:52,429 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:19:52,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:19:52,665 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:19:52,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:19:52,671 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 05:19:52,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:52 BoogieIcfgContainer [2022-07-20 05:19:52,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:19:52,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:19:52,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:19:52,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:19:52,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:19:51" (1/3) ... [2022-07-20 05:19:52,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7525b892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:52, skipping insertion in model container [2022-07-20 05:19:52,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:52" (2/3) ... [2022-07-20 05:19:52,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7525b892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:52, skipping insertion in model container [2022-07-20 05:19:52,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:52" (3/3) ... [2022-07-20 05:19:52,681 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2022-07-20 05:19:52,693 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:19:52,694 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-20 05:19:52,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:19:52,743 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ebd4b98, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7545dbc4 [2022-07-20 05:19:52,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-20 05:19:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 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) [2022-07-20 05:19:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:19:52,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:52,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:52,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-20 05:19:52,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:52,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492050530] [2022-07-20 05:19:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:52,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:52,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492050530] [2022-07-20 05:19:52,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492050530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:52,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:52,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318161258] [2022-07-20 05:19:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:52,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:52,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:53,010 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:53,076 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-20 05:19:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:19:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:53,086 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:19:53,087 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:19:53,089 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 [2022-07-20 05:19:53,092 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:53,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:19:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-07-20 05:19:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-20 05:19:53,136 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-07-20 05:19:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:53,136 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-20 05:19:53,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-20 05:19:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:19:53,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:53,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:53,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:19:53,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-20 05:19:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:53,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253811402] [2022-07-20 05:19:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:53,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253811402] [2022-07-20 05:19:53,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253811402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:53,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:53,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:19:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118482988] [2022-07-20 05:19:53,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:53,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:19:53,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:19:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:53,250 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:53,306 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-20 05:19:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:19:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:19:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:53,308 INFO L225 Difference]: With dead ends: 53 [2022-07-20 05:19:53,309 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 05:19:53,309 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 [2022-07-20 05:19:53,311 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:53,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 05:19:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-20 05:19:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-20 05:19:53,320 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-20 05:19:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:53,320 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-20 05:19:53,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-20 05:19:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:19:53,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:53,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:53,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:19:53,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-20 05:19:53,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:53,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227393633] [2022-07-20 05:19:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:53,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:53,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227393633] [2022-07-20 05:19:53,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227393633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:53,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:53,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:53,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830385937] [2022-07-20 05:19:53,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:53,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:53,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:53,453 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:53,609 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-07-20 05:19:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:19:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:53,611 INFO L225 Difference]: With dead ends: 97 [2022-07-20 05:19:53,615 INFO L226 Difference]: Without dead ends: 97 [2022-07-20 05:19:53,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:53,617 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:53,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 96 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-20 05:19:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-07-20 05:19:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-20 05:19:53,626 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-07-20 05:19:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:53,627 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-20 05:19:53,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-20 05:19:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:19:53,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:53,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:53,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:19:53,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-20 05:19:53,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:53,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229795876] [2022-07-20 05:19:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:53,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:53,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:53,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229795876] [2022-07-20 05:19:53,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229795876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:53,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:53,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:19:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91703366] [2022-07-20 05:19:53,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:53,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:53,683 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:53,714 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-20 05:19:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:19:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:53,715 INFO L225 Difference]: With dead ends: 54 [2022-07-20 05:19:53,715 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 05:19:53,716 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 [2022-07-20 05:19:53,717 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:53,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 05:19:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-20 05:19:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-20 05:19:53,723 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2022-07-20 05:19:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:53,723 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-20 05:19:53,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-20 05:19:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:19:53,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:53,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:53,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:19:53,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-20 05:19:53,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:53,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670425840] [2022-07-20 05:19:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:53,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670425840] [2022-07-20 05:19:53,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670425840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:53,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:53,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:53,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228849781] [2022-07-20 05:19:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:53,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:53,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:53,761 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:53,784 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-20 05:19:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:53,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:19:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:53,785 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:19:53,786 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:19:53,786 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 [2022-07-20 05:19:53,787 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:53,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:19:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-20 05:19:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-07-20 05:19:53,793 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2022-07-20 05:19:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:53,794 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-07-20 05:19:53,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-07-20 05:19:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:19:53,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:53,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:53,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:19:53,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-20 05:19:53,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:53,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185139495] [2022-07-20 05:19:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:53,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:53,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185139495] [2022-07-20 05:19:53,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185139495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:53,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:53,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:19:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139939381] [2022-07-20 05:19:53,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:19:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:19:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:53,822 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:53,845 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-07-20 05:19:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:19:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:19:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:53,846 INFO L225 Difference]: With dead ends: 63 [2022-07-20 05:19:53,847 INFO L226 Difference]: Without dead ends: 63 [2022-07-20 05:19:53,847 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 [2022-07-20 05:19:53,848 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:53,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-20 05:19:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-20 05:19:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-20 05:19:53,853 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-20 05:19:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:53,853 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-20 05:19:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-20 05:19:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:19:53,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:53,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:53,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:19:53,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-20 05:19:53,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:53,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607159509] [2022-07-20 05:19:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:53,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:53,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607159509] [2022-07-20 05:19:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607159509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:53,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:53,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532233662] [2022-07-20 05:19:53,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:53,913 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:53,995 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-20 05:19:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:19:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:53,996 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:19:53,997 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:19:53,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:19:53,998 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:53,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:19:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-20 05:19:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-07-20 05:19:54,003 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2022-07-20 05:19:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:54,003 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-07-20 05:19:54,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-07-20 05:19:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:19:54,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:54,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:54,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:19:54,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-20 05:19:54,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:54,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605388543] [2022-07-20 05:19:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:54,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:54,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605388543] [2022-07-20 05:19:54,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605388543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:54,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:54,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:19:54,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501256807] [2022-07-20 05:19:54,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:54,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:54,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:54,047 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:54,072 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-07-20 05:19:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:19:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:54,073 INFO L225 Difference]: With dead ends: 64 [2022-07-20 05:19:54,074 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 05:19:54,074 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 [2022-07-20 05:19:54,075 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:54,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 05:19:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-20 05:19:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-20 05:19:54,079 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2022-07-20 05:19:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:54,079 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-20 05:19:54,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-20 05:19:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:19:54,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:54,080 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:54,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 05:19:54,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-20 05:19:54,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:54,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699943662] [2022-07-20 05:19:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:54,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699943662] [2022-07-20 05:19:54,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699943662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113852984] [2022-07-20 05:19:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:54,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:54,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:54,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:19:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:19:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:54,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:54,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:19:54,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:19:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113852984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:54,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:54,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-20 05:19:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401309360] [2022-07-20 05:19:54,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:54,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:19:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:19:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:19:54,575 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2022-07-20 05:19:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:54,757 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-07-20 05:19:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:19:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 [2022-07-20 05:19:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:54,760 INFO L225 Difference]: With dead ends: 149 [2022-07-20 05:19:54,760 INFO L226 Difference]: Without dead ends: 149 [2022-07-20 05:19:54,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:19:54,763 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 207 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:54,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 281 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-20 05:19:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2022-07-20 05:19:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 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) [2022-07-20 05:19:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-20 05:19:54,771 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2022-07-20 05:19:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:54,772 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-20 05:19:54,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2022-07-20 05:19:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-20 05:19:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:19:54,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:54,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:54,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:54,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:54,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2022-07-20 05:19:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087447948] [2022-07-20 05:19:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:54,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087447948] [2022-07-20 05:19:55,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087447948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:55,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:55,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:19:55,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928409090] [2022-07-20 05:19:55,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:55,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:55,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:55,024 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:55,057 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-20 05:19:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-07-20 05:19:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:55,058 INFO L225 Difference]: With dead ends: 57 [2022-07-20 05:19:55,058 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 05:19:55,058 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 [2022-07-20 05:19:55,059 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:55,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 05:19:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-20 05:19:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-20 05:19:55,065 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-20 05:19:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:55,066 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-20 05:19:55,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-20 05:19:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:19:55,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:55,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 05:19:55,069 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-20 05:19:55,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:55,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011619611] [2022-07-20 05:19:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:55,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:55,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:55,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011619611] [2022-07-20 05:19:55,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011619611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:55,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:55,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:19:55,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387973607] [2022-07-20 05:19:55,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:55,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:19:55,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:55,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:19:55,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:19:55,165 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:55,230 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-20 05:19:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:55,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-07-20 05:19:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:55,232 INFO L225 Difference]: With dead ends: 80 [2022-07-20 05:19:55,232 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 05:19:55,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:19:55,233 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:55,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 66 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 05:19:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-20 05:19:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-20 05:19:55,244 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2022-07-20 05:19:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:55,244 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-20 05:19:55,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-20 05:19:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:19:55,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:55,247 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:55,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 05:19:55,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-20 05:19:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351011580] [2022-07-20 05:19:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:55,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:55,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351011580] [2022-07-20 05:19:55,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351011580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571964569] [2022-07-20 05:19:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:55,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:55,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:55,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:55,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:19:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:19:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:55,428 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:19:55,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:19:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:55,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:55,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571964569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:55,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:55,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-20 05:19:55,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556382167] [2022-07-20 05:19:55,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:55,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:19:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:19:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:19:55,628 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:55,812 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2022-07-20 05:19:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:19:55,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2022-07-20 05:19:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:55,813 INFO L225 Difference]: With dead ends: 124 [2022-07-20 05:19:55,813 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 05:19:55,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:19:55,814 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 258 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:55,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 232 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 05:19:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2022-07-20 05:19:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-20 05:19:55,817 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2022-07-20 05:19:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:55,817 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-20 05:19:55,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-20 05:19:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:19:55,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:55,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:55,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:56,044 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,SelfDestructingSolverStorable11 [2022-07-20 05:19:56,045 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2022-07-20 05:19:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:56,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750215134] [2022-07-20 05:19:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:56,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:56,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750215134] [2022-07-20 05:19:56,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750215134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:56,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:56,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179056909] [2022-07-20 05:19:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:56,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:56,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:56,118 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:56,143 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-20 05:19:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:56,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:19:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:56,144 INFO L225 Difference]: With dead ends: 56 [2022-07-20 05:19:56,144 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 05:19:56,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:56,145 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:56,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 05:19:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-20 05:19:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-20 05:19:56,147 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-07-20 05:19:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:56,148 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-20 05:19:56,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-20 05:19:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:19:56,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:56,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:56,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 05:19:56,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2022-07-20 05:19:56,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:56,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392801587] [2022-07-20 05:19:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:56,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:56,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392801587] [2022-07-20 05:19:56,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392801587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:56,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:56,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:56,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19239173] [2022-07-20 05:19:56,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:56,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:56,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:56,200 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:56,239 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-20 05:19:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:19:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:56,240 INFO L225 Difference]: With dead ends: 50 [2022-07-20 05:19:56,240 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 05:19:56,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:56,241 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:56,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 05:19:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-20 05:19:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-20 05:19:56,243 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2022-07-20 05:19:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:56,243 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-20 05:19:56,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-20 05:19:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:19:56,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:56,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:56,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 05:19:56,244 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2022-07-20 05:19:56,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:56,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097332628] [2022-07-20 05:19:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097332628] [2022-07-20 05:19:56,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097332628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:56,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:56,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:19:56,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394243516] [2022-07-20 05:19:56,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:56,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:19:56,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:19:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:56,302 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:56,364 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-20 05:19:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:19:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:19:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:56,365 INFO L225 Difference]: With dead ends: 62 [2022-07-20 05:19:56,365 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 05:19:56,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:19:56,366 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:56,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 05:19:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-07-20 05:19:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-20 05:19:56,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2022-07-20 05:19:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:56,368 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-20 05:19:56,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-20 05:19:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:19:56,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:56,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:56,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 05:19:56,369 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2022-07-20 05:19:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:56,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334173058] [2022-07-20 05:19:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:56,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334173058] [2022-07-20 05:19:56,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334173058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:56,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:56,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:19:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893714675] [2022-07-20 05:19:56,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:19:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:19:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:56,389 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:56,396 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-07-20 05:19:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:19:56,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-07-20 05:19:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:56,397 INFO L225 Difference]: With dead ends: 59 [2022-07-20 05:19:56,397 INFO L226 Difference]: Without dead ends: 59 [2022-07-20 05:19:56,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:56,398 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:56,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-20 05:19:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-20 05:19:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 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) [2022-07-20 05:19:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-20 05:19:56,407 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2022-07-20 05:19:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:56,407 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-20 05:19:56,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-20 05:19:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:19:56,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:56,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:56,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 05:19:56,408 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2022-07-20 05:19:56,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:56,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467426603] [2022-07-20 05:19:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:56,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467426603] [2022-07-20 05:19:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467426603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:56,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:56,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:19:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339058297] [2022-07-20 05:19:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:19:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:19:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:56,486 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:56,551 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-07-20 05:19:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:19:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-07-20 05:19:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:56,552 INFO L225 Difference]: With dead ends: 71 [2022-07-20 05:19:56,552 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 05:19:56,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:19:56,553 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:56,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 185 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 05:19:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-20 05:19:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 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) [2022-07-20 05:19:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-20 05:19:56,559 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2022-07-20 05:19:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:56,559 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-20 05:19:56,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-20 05:19:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:19:56,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:56,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:56,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 05:19:56,560 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2022-07-20 05:19:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:56,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052966180] [2022-07-20 05:19:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:56,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:56,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052966180] [2022-07-20 05:19:56,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052966180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:56,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:56,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 05:19:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684018396] [2022-07-20 05:19:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:56,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:19:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:19:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:19:56,661 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:56,740 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-07-20 05:19:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:19:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-07-20 05:19:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:56,741 INFO L225 Difference]: With dead ends: 74 [2022-07-20 05:19:56,741 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 05:19:56,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:19:56,742 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:56,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 05:19:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-20 05:19:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-07-20 05:19:56,744 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2022-07-20 05:19:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:56,744 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-07-20 05:19:56,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-07-20 05:19:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:19:56,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:56,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:56,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 05:19:56,745 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:56,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2022-07-20 05:19:56,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:56,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623513587] [2022-07-20 05:19:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:56,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:56,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:56,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623513587] [2022-07-20 05:19:56,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623513587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:56,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:56,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:19:56,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336069319] [2022-07-20 05:19:56,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:56,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:19:56,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:19:56,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:19:56,842 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:56,997 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-07-20 05:19:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:19:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 05:19:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:56,998 INFO L225 Difference]: With dead ends: 75 [2022-07-20 05:19:56,998 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 05:19:56,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:19:56,998 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:56,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 187 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 05:19:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-20 05:19:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-20 05:19:57,001 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2022-07-20 05:19:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:57,001 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-20 05:19:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-20 05:19:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:19:57,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:57,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:57,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 05:19:57,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2022-07-20 05:19:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809484244] [2022-07-20 05:19:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:57,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:57,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:57,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809484244] [2022-07-20 05:19:57,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809484244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:57,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:57,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 05:19:57,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019029143] [2022-07-20 05:19:57,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:19:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:57,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:19:57,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:19:57,132 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:57,356 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-07-20 05:19:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:19:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 05:19:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:57,357 INFO L225 Difference]: With dead ends: 96 [2022-07-20 05:19:57,357 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:19:57,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:19:57,362 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:57,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 197 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:19:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-07-20 05:19:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-07-20 05:19:57,365 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2022-07-20 05:19:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:57,365 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-07-20 05:19:57,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-07-20 05:19:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:19:57,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:57,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 05:19:57,366 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:57,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2022-07-20 05:19:57,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:57,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141783389] [2022-07-20 05:19:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:57,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:57,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141783389] [2022-07-20 05:19:57,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141783389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:57,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:57,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:19:57,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714534494] [2022-07-20 05:19:57,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:57,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:19:57,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:19:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:19:57,468 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:57,637 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-07-20 05:19:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:19:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 05:19:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:57,638 INFO L225 Difference]: With dead ends: 75 [2022-07-20 05:19:57,638 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 05:19:57,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:19:57,639 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:57,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 159 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 05:19:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-07-20 05:19:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-20 05:19:57,643 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2022-07-20 05:19:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:57,643 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-20 05:19:57,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-20 05:19:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 05:19:57,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:57,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:57,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 05:19:57,644 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2022-07-20 05:19:57,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:57,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838841196] [2022-07-20 05:19:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:57,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838841196] [2022-07-20 05:19:57,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838841196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451458777] [2022-07-20 05:19:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:57,762 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:57,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:19:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:19:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:57,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:58,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-20 05:19:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:58,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451458777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:58,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:58,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-20 05:19:58,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335203846] [2022-07-20 05:19:58,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:58,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:19:58,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:19:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:19:58,102 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:58,297 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-07-20 05:19:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:19:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 05:19:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:58,300 INFO L225 Difference]: With dead ends: 69 [2022-07-20 05:19:58,300 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 05:19:58,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:19:58,301 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 458 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:58,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 143 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 05:19:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2022-07-20 05:19:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 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) [2022-07-20 05:19:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-20 05:19:58,303 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2022-07-20 05:19:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:58,303 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-20 05:19:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-20 05:19:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:19:58,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:58,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:58,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:58,508 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2022-07-20 05:19:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:58,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893787660] [2022-07-20 05:19:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:58,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893787660] [2022-07-20 05:19:58,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893787660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:58,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496675793] [2022-07-20 05:19:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:58,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:58,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:58,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:19:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:19:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:58,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:58,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-20 05:19:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:58,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496675793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:58,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:58,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-20 05:19:58,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034488626] [2022-07-20 05:19:58,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:19:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:19:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:19:58,929 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:59,095 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-07-20 05:19:59,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:19:59,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 05:19:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:59,096 INFO L225 Difference]: With dead ends: 86 [2022-07-20 05:19:59,096 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 05:19:59,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:19:59,097 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 344 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:59,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 190 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 05:19:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2022-07-20 05:19:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 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) [2022-07-20 05:19:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-07-20 05:19:59,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2022-07-20 05:19:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:59,099 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-07-20 05:19:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-07-20 05:19:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 05:19:59,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:59,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:59,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:59,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:59,300 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2022-07-20 05:19:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:59,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187650594] [2022-07-20 05:19:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:59,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:59,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187650594] [2022-07-20 05:19:59,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187650594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513553847] [2022-07-20 05:19:59,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:19:59,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:59,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:59,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:59,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:19:59,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:19:59,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:19:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:59,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:19:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:59,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:00,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:20:00,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:20:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:00,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513553847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:00,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:00,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-07-20 05:20:00,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471895649] [2022-07-20 05:20:00,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:00,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 05:20:00,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:00,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 05:20:00,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-07-20 05:20:00,225 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:00,634 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2022-07-20 05:20:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:20:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 05:20:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:00,635 INFO L225 Difference]: With dead ends: 106 [2022-07-20 05:20:00,635 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 05:20:00,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 05:20:00,636 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 188 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:00,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 423 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 234 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-07-20 05:20:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 05:20:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-20 05:20:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 95 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-07-20 05:20:00,639 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 36 [2022-07-20 05:20:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:00,639 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-07-20 05:20:00,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-07-20 05:20:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 05:20:00,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:00,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:00,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:00,847 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,SelfDestructingSolverStorable23 [2022-07-20 05:20:00,848 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash -304963965, now seen corresponding path program 3 times [2022-07-20 05:20:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:00,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835738454] [2022-07-20 05:20:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:00,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:00,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:00,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835738454] [2022-07-20 05:20:00,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835738454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:00,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429924502] [2022-07-20 05:20:00,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:00,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:00,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:00,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:20:01,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 05:20:01,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:01,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:20:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:01,099 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:01,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:01,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:01,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429924502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:01,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:01,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-07-20 05:20:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946177232] [2022-07-20 05:20:01,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:01,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 05:20:01,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 05:20:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:20:01,682 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:02,025 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-07-20 05:20:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:20:02,026 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 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 40 [2022-07-20 05:20:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:02,027 INFO L225 Difference]: With dead ends: 149 [2022-07-20 05:20:02,027 INFO L226 Difference]: Without dead ends: 149 [2022-07-20 05:20:02,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:20:02,029 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 375 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:02,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 269 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:20:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-20 05:20:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 108. [2022-07-20 05:20:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.1226415094339623) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2022-07-20 05:20:02,033 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 40 [2022-07-20 05:20:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:02,033 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2022-07-20 05:20:02,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2022-07-20 05:20:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:20:02,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:02,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:02,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:02,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:02,235 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:02,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:02,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2022-07-20 05:20:02,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:02,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448930459] [2022-07-20 05:20:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:02,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:02,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448930459] [2022-07-20 05:20:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448930459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966672317] [2022-07-20 05:20:02,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:02,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:02,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:02,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:02,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:20:02,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:02,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 05:20:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:02,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:02,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:02,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:20:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:03,601 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:03,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2022-07-20 05:20:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:03,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:04,556 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:04,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2022-07-20 05:20:04,577 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-20 05:20:04,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 71 [2022-07-20 05:20:04,595 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-20 05:20:04,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2022-07-20 05:20:04,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 18 [2022-07-20 05:20:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:04,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966672317] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:04,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:04,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 21] total 49 [2022-07-20 05:20:04,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476233045] [2022-07-20 05:20:04,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:04,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 05:20:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 05:20:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 05:20:04,886 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 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) [2022-07-20 05:20:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:06,116 INFO L93 Difference]: Finished difference Result 217 states and 232 transitions. [2022-07-20 05:20:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 05:20:06,117 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 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 46 [2022-07-20 05:20:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:06,119 INFO L225 Difference]: With dead ends: 217 [2022-07-20 05:20:06,119 INFO L226 Difference]: Without dead ends: 194 [2022-07-20 05:20:06,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=642, Invalid=5058, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 05:20:06,122 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:06,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 251 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 192 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-07-20 05:20:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-20 05:20:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2022-07-20 05:20:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.0918918918918918) internal successors, (202), 186 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2022-07-20 05:20:06,134 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 46 [2022-07-20 05:20:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:06,134 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2022-07-20 05:20:06,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 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) [2022-07-20 05:20:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2022-07-20 05:20:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:20:06,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:06,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:06,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:06,356 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 4 times [2022-07-20 05:20:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:06,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973664137] [2022-07-20 05:20:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:06,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:06,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:06,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973664137] [2022-07-20 05:20:06,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973664137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:06,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658884614] [2022-07-20 05:20:06,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:20:06,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:06,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:06,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:06,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:20:06,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:20:06,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:06,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 05:20:06,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:06,677 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:06,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:06,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:20:07,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:07,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 05:20:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:07,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:07,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-20 05:20:07,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-07-20 05:20:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:07,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658884614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:07,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:07,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2022-07-20 05:20:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548244612] [2022-07-20 05:20:07,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:20:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:20:07,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:20:07,728 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:08,735 INFO L93 Difference]: Finished difference Result 238 states and 256 transitions. [2022-07-20 05:20:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:20:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 0 states have call successors, (0), 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 46 [2022-07-20 05:20:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:08,736 INFO L225 Difference]: With dead ends: 238 [2022-07-20 05:20:08,736 INFO L226 Difference]: Without dead ends: 235 [2022-07-20 05:20:08,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=534, Invalid=4158, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 05:20:08,738 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 220 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:08,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 370 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 315 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-07-20 05:20:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-20 05:20:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2022-07-20 05:20:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0888888888888888) internal successors, (245), 226 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2022-07-20 05:20:08,743 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 46 [2022-07-20 05:20:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:08,743 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2022-07-20 05:20:08,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2022-07-20 05:20:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 05:20:08,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:08,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:08,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:08,955 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,SelfDestructingSolverStorable26 [2022-07-20 05:20:08,956 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 5 times [2022-07-20 05:20:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:08,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793987671] [2022-07-20 05:20:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:09,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793987671] [2022-07-20 05:20:09,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793987671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956827501] [2022-07-20 05:20:09,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:20:09,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:09,108 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:09,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:20:09,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:20:09,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:20:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:09,225 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:09,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:09,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:09,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956827501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:09,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:09,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-20 05:20:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337846786] [2022-07-20 05:20:09,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:09,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 05:20:09,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 05:20:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:20:09,771 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:10,217 INFO L93 Difference]: Finished difference Result 348 states and 374 transitions. [2022-07-20 05:20:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:20:10,217 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 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 50 [2022-07-20 05:20:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:10,218 INFO L225 Difference]: With dead ends: 348 [2022-07-20 05:20:10,218 INFO L226 Difference]: Without dead ends: 348 [2022-07-20 05:20:10,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:20:10,219 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 296 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:10,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 490 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:20:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-20 05:20:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 295. [2022-07-20 05:20:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 293 states have (on average 1.098976109215017) internal successors, (322), 294 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 322 transitions. [2022-07-20 05:20:10,227 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 322 transitions. Word has length 50 [2022-07-20 05:20:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:10,227 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 322 transitions. [2022-07-20 05:20:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 322 transitions. [2022-07-20 05:20:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 05:20:10,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:10,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:10,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:10,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 05:20:10,447 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:10,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash -847276983, now seen corresponding path program 1 times [2022-07-20 05:20:10,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:10,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976272348] [2022-07-20 05:20:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:10,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:20:10,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976272348] [2022-07-20 05:20:10,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976272348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:10,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899345958] [2022-07-20 05:20:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:10,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:10,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:10,624 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:10,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:20:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:10,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-20 05:20:10,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:10,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:10,880 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:10,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-20 05:20:10,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 3 [2022-07-20 05:20:15,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:15,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:15,088 INFO L356 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2022-07-20 05:20:15,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 77 [2022-07-20 05:20:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:15,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:16,931 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:16,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 163 [2022-07-20 05:20:16,967 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-20 05:20:16,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 294 [2022-07-20 05:20:17,013 INFO L356 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-07-20 05:20:17,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 279 treesize of output 255 [2022-07-20 05:20:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:18,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899345958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:18,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:18,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 28, 28] total 62 [2022-07-20 05:20:18,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724069342] [2022-07-20 05:20:18,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:18,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 05:20:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 05:20:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=3470, Unknown=2, NotChecked=0, Total=3782 [2022-07-20 05:20:18,075 INFO L87 Difference]: Start difference. First operand 295 states and 322 transitions. Second operand has 62 states, 62 states have (on average 2.2419354838709675) internal successors, (139), 62 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:20,047 INFO L93 Difference]: Finished difference Result 339 states and 366 transitions. [2022-07-20 05:20:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:20:20,048 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2419354838709675) internal successors, (139), 62 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-20 05:20:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:20,049 INFO L225 Difference]: With dead ends: 339 [2022-07-20 05:20:20,049 INFO L226 Difference]: Without dead ends: 305 [2022-07-20 05:20:20,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=863, Invalid=5941, Unknown=2, NotChecked=0, Total=6806 [2022-07-20 05:20:20,051 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:20,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 635 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 435 Invalid, 0 Unknown, 236 Unchecked, 0.2s Time] [2022-07-20 05:20:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-20 05:20:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 301. [2022-07-20 05:20:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 299 states have (on average 1.0969899665551839) internal successors, (328), 300 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 328 transitions. [2022-07-20 05:20:20,061 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 328 transitions. Word has length 56 [2022-07-20 05:20:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:20,062 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 328 transitions. [2022-07-20 05:20:20,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2419354838709675) internal successors, (139), 62 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 328 transitions. [2022-07-20 05:20:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 05:20:20,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:20,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:20,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:20,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 05:20:20,275 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash 509273480, now seen corresponding path program 6 times [2022-07-20 05:20:20,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:20,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734582993] [2022-07-20 05:20:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:20,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:20,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734582993] [2022-07-20 05:20:20,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734582993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:20,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946436113] [2022-07-20 05:20:20,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:20:20,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:20,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:20,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:20,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:20:20,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 05:20:20,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:20:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:20,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:23,029 INFO L356 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2022-07-20 05:20:23,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2022-07-20 05:20:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 28 refuted. 10 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:23,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:23,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-07-20 05:20:23,390 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-20 05:20:23,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 64 [2022-07-20 05:20:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946436113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:23,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:23,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 49 [2022-07-20 05:20:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944598086] [2022-07-20 05:20:23,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:23,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 05:20:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 05:20:23,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2114, Unknown=8, NotChecked=0, Total=2352 [2022-07-20 05:20:23,565 INFO L87 Difference]: Start difference. First operand 301 states and 328 transitions. Second operand has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:28,549 INFO L93 Difference]: Finished difference Result 391 states and 421 transitions. [2022-07-20 05:20:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-20 05:20:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 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 56 [2022-07-20 05:20:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:28,551 INFO L225 Difference]: With dead ends: 391 [2022-07-20 05:20:28,551 INFO L226 Difference]: Without dead ends: 360 [2022-07-20 05:20:28,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=667, Invalid=5481, Unknown=14, NotChecked=0, Total=6162 [2022-07-20 05:20:28,553 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:28,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 806 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 709 Invalid, 0 Unknown, 160 Unchecked, 0.3s Time] [2022-07-20 05:20:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-20 05:20:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 334. [2022-07-20 05:20:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 332 states have (on average 1.0963855421686748) internal successors, (364), 333 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 364 transitions. [2022-07-20 05:20:28,560 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 364 transitions. Word has length 56 [2022-07-20 05:20:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:28,560 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 364 transitions. [2022-07-20 05:20:28,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 364 transitions. [2022-07-20 05:20:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 05:20:28,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:28,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:28,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:28,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:28,775 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash 223488613, now seen corresponding path program 7 times [2022-07-20 05:20:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:28,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163034697] [2022-07-20 05:20:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163034697] [2022-07-20 05:20:28,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163034697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242300541] [2022-07-20 05:20:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:20:28,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:28,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:28,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:20:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:29,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 05:20:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:29,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:29,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-20 05:20:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:29,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242300541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:29,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:29,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2022-07-20 05:20:29,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762032192] [2022-07-20 05:20:29,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:29,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:20:29,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:29,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:20:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:20:29,494 INFO L87 Difference]: Start difference. First operand 334 states and 364 transitions. Second operand has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 31 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:30,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:30,265 INFO L93 Difference]: Finished difference Result 484 states and 521 transitions. [2022-07-20 05:20:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:20:30,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 31 states have internal predecessors, (128), 0 states have call successors, (0), 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 60 [2022-07-20 05:20:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:30,270 INFO L225 Difference]: With dead ends: 484 [2022-07-20 05:20:30,270 INFO L226 Difference]: Without dead ends: 484 [2022-07-20 05:20:30,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 05:20:30,271 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 616 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:30,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 750 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:20:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-07-20 05:20:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 414. [2022-07-20 05:20:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 412 states have (on average 1.1019417475728155) internal successors, (454), 413 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 454 transitions. [2022-07-20 05:20:30,282 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 454 transitions. Word has length 60 [2022-07-20 05:20:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:30,283 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 454 transitions. [2022-07-20 05:20:30,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 31 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 454 transitions. [2022-07-20 05:20:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 05:20:30,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:30,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:30,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:30,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:30,511 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash -662058626, now seen corresponding path program 2 times [2022-07-20 05:20:30,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:30,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631317384] [2022-07-20 05:20:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:30,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:20:30,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631317384] [2022-07-20 05:20:30,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631317384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:30,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726119202] [2022-07-20 05:20:30,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:30,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:30,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:30,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:30,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:20:30,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:30,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 05:20:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:20:30,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:31,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-20 05:20:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:20:31,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726119202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:31,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:31,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-20 05:20:31,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897324477] [2022-07-20 05:20:31,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:31,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 05:20:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 05:20:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:20:31,060 INFO L87 Difference]: Start difference. First operand 414 states and 454 transitions. Second operand has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:31,309 INFO L93 Difference]: Finished difference Result 619 states and 685 transitions. [2022-07-20 05:20:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:20:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 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 60 [2022-07-20 05:20:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:31,311 INFO L225 Difference]: With dead ends: 619 [2022-07-20 05:20:31,311 INFO L226 Difference]: Without dead ends: 619 [2022-07-20 05:20:31,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:20:31,312 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 455 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:31,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 322 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-07-20 05:20:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 510. [2022-07-20 05:20:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.1122047244094488) internal successors, (565), 509 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 565 transitions. [2022-07-20 05:20:31,324 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 565 transitions. Word has length 60 [2022-07-20 05:20:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:31,325 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 565 transitions. [2022-07-20 05:20:31,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 565 transitions. [2022-07-20 05:20:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 05:20:31,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:31,328 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:31,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:31,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 05:20:31,549 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 1 times [2022-07-20 05:20:31,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:31,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090596759] [2022-07-20 05:20:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:31,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:20:32,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090596759] [2022-07-20 05:20:32,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090596759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365644101] [2022-07-20 05:20:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:32,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:32,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:32,063 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:32,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:20:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:32,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:20:32,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:32,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:32,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:20:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:32,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:32,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:20:32,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:20:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:32,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365644101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:32,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:32,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 33 [2022-07-20 05:20:32,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072074984] [2022-07-20 05:20:32,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:32,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 05:20:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 05:20:32,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:20:32,746 INFO L87 Difference]: Start difference. First operand 510 states and 565 transitions. Second operand has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:34,573 INFO L93 Difference]: Finished difference Result 1009 states and 1107 transitions. [2022-07-20 05:20:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 05:20:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 05:20:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:34,576 INFO L225 Difference]: With dead ends: 1009 [2022-07-20 05:20:34,576 INFO L226 Difference]: Without dead ends: 997 [2022-07-20 05:20:34,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=483, Invalid=3299, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 05:20:34,578 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 546 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:34,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1033 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1085 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-07-20 05:20:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-07-20 05:20:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 640. [2022-07-20 05:20:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 638 states have (on average 1.1065830721003134) internal successors, (706), 639 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 706 transitions. [2022-07-20 05:20:34,590 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 706 transitions. Word has length 63 [2022-07-20 05:20:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:34,590 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 706 transitions. [2022-07-20 05:20:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 706 transitions. [2022-07-20 05:20:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 05:20:34,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:34,592 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:34,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:34,816 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 8 times [2022-07-20 05:20:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:34,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913312033] [2022-07-20 05:20:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913312033] [2022-07-20 05:20:35,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913312033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779882514] [2022-07-20 05:20:35,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:35,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:35,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:35,052 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:35,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:20:35,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 05:20:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:35,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:35,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:20:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:35,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:20:35,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:20:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:35,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779882514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:35,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:35,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2022-07-20 05:20:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909662959] [2022-07-20 05:20:35,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 05:20:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 05:20:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 05:20:35,722 INFO L87 Difference]: Start difference. First operand 640 states and 706 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:36,472 INFO L93 Difference]: Finished difference Result 935 states and 1018 transitions. [2022-07-20 05:20:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:20:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 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 66 [2022-07-20 05:20:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:36,474 INFO L225 Difference]: With dead ends: 935 [2022-07-20 05:20:36,474 INFO L226 Difference]: Without dead ends: 892 [2022-07-20 05:20:36,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=2040, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 05:20:36,475 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 609 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:36,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1477 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1135 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-07-20 05:20:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-07-20 05:20:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 758. [2022-07-20 05:20:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 756 states have (on average 1.1058201058201058) internal successors, (836), 757 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 836 transitions. [2022-07-20 05:20:36,487 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 836 transitions. Word has length 66 [2022-07-20 05:20:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:36,488 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 836 transitions. [2022-07-20 05:20:36,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 836 transitions. [2022-07-20 05:20:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 05:20:36,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:36,489 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:36,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:36,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:36,716 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1055980246, now seen corresponding path program 9 times [2022-07-20 05:20:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473223816] [2022-07-20 05:20:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:36,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473223816] [2022-07-20 05:20:36,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473223816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841752561] [2022-07-20 05:20:36,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:36,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:36,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:36,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:20:37,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 05:20:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 05:20:37,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:37,080 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:37,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:37,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:38,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841752561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:38,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:38,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2022-07-20 05:20:38,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185590732] [2022-07-20 05:20:38,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:38,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:20:38,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:20:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:20:38,043 INFO L87 Difference]: Start difference. First operand 758 states and 836 transitions. Second operand has 46 states, 45 states have (on average 4.488888888888889) internal successors, (202), 46 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:39,315 INFO L93 Difference]: Finished difference Result 974 states and 1064 transitions. [2022-07-20 05:20:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:20:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.488888888888889) internal successors, (202), 46 states have internal predecessors, (202), 0 states have call successors, (0), 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 70 [2022-07-20 05:20:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:39,318 INFO L225 Difference]: With dead ends: 974 [2022-07-20 05:20:39,318 INFO L226 Difference]: Without dead ends: 974 [2022-07-20 05:20:39,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=865, Invalid=3425, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 05:20:39,319 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 849 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:39,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 896 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:20:39,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-07-20 05:20:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 862. [2022-07-20 05:20:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.1116279069767443) internal successors, (956), 861 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 956 transitions. [2022-07-20 05:20:39,332 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 956 transitions. Word has length 70 [2022-07-20 05:20:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:39,333 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 956 transitions. [2022-07-20 05:20:39,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.488888888888889) internal successors, (202), 46 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 956 transitions. [2022-07-20 05:20:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:20:39,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:39,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:39,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:39,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 05:20:39,547 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2120159335, now seen corresponding path program 3 times [2022-07-20 05:20:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:39,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108810258] [2022-07-20 05:20:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:39,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:20:39,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:39,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108810258] [2022-07-20 05:20:39,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108810258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:39,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105615323] [2022-07-20 05:20:39,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:39,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:39,714 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:39,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:20:39,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:20:39,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 05:20:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:39,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:39,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:39,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:20:40,322 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-20 05:20:40,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-20 05:20:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:20:40,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:40,628 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_695 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_695) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:20:40,632 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:40,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:20:40,637 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:40,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:20:40,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:20:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:20:40,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105615323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:40,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:40,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 37 [2022-07-20 05:20:40,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131952934] [2022-07-20 05:20:40,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:40,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:20:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:20:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1145, Unknown=1, NotChecked=68, Total=1332 [2022-07-20 05:20:40,811 INFO L87 Difference]: Start difference. First operand 862 states and 956 transitions. Second operand has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:41,127 INFO L93 Difference]: Finished difference Result 1185 states and 1303 transitions. [2022-07-20 05:20:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:20:41,128 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 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 73 [2022-07-20 05:20:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:41,133 INFO L225 Difference]: With dead ends: 1185 [2022-07-20 05:20:41,133 INFO L226 Difference]: Without dead ends: 1032 [2022-07-20 05:20:41,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1558, Unknown=1, NotChecked=80, Total=1806 [2022-07-20 05:20:41,134 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 72 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:41,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 670 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 493 Invalid, 0 Unknown, 175 Unchecked, 0.2s Time] [2022-07-20 05:20:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-07-20 05:20:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 904. [2022-07-20 05:20:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 902 states have (on average 1.1130820399113082) internal successors, (1004), 903 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1004 transitions. [2022-07-20 05:20:41,147 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1004 transitions. Word has length 73 [2022-07-20 05:20:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:41,147 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1004 transitions. [2022-07-20 05:20:41,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1004 transitions. [2022-07-20 05:20:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:20:41,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:41,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:41,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:41,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:41,364 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash 553451124, now seen corresponding path program 2 times [2022-07-20 05:20:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163651053] [2022-07-20 05:20:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:20:41,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163651053] [2022-07-20 05:20:41,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163651053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423438707] [2022-07-20 05:20:41,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:41,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:41,625 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:20:41,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:41,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:41,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 05:20:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:41,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:42,259 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:42,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-20 05:20:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:42,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:43,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:20:43,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:20:43,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 27 [2022-07-20 05:20:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:43,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423438707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:43,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:43,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 46 [2022-07-20 05:20:43,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828932290] [2022-07-20 05:20:43,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:43,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:20:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:20:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:20:43,052 INFO L87 Difference]: Start difference. First operand 904 states and 1004 transitions. Second operand has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 46 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:44,856 INFO L93 Difference]: Finished difference Result 1179 states and 1292 transitions. [2022-07-20 05:20:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 05:20:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 46 states have internal predecessors, (179), 0 states have call successors, (0), 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 73 [2022-07-20 05:20:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:44,859 INFO L225 Difference]: With dead ends: 1179 [2022-07-20 05:20:44,859 INFO L226 Difference]: Without dead ends: 1145 [2022-07-20 05:20:44,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=567, Invalid=5285, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 05:20:44,860 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 270 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:44,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1189 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1020 Invalid, 0 Unknown, 565 Unchecked, 0.4s Time] [2022-07-20 05:20:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-20 05:20:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 945. [2022-07-20 05:20:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 943 states have (on average 1.1113467656415694) internal successors, (1048), 944 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1048 transitions. [2022-07-20 05:20:44,878 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1048 transitions. Word has length 73 [2022-07-20 05:20:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:44,878 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1048 transitions. [2022-07-20 05:20:44,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 46 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1048 transitions. [2022-07-20 05:20:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:20:44,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:44,880 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:44,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:45,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:45,095 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -429292212, now seen corresponding path program 3 times [2022-07-20 05:20:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:45,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700235194] [2022-07-20 05:20:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:45,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700235194] [2022-07-20 05:20:45,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700235194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699085233] [2022-07-20 05:20:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:45,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:45,420 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:45,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:20:45,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:20:45,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:20:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:45,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:45,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:20:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 05:20:45,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:45,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:20:45,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:20:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 05:20:46,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699085233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:46,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:46,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 31 [2022-07-20 05:20:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674489284] [2022-07-20 05:20:46,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:20:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:20:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:20:46,032 INFO L87 Difference]: Start difference. First operand 945 states and 1048 transitions. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:47,075 INFO L93 Difference]: Finished difference Result 995 states and 1089 transitions. [2022-07-20 05:20:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:20:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-20 05:20:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:47,078 INFO L225 Difference]: With dead ends: 995 [2022-07-20 05:20:47,078 INFO L226 Difference]: Without dead ends: 989 [2022-07-20 05:20:47,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=425, Invalid=2767, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 05:20:47,079 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 410 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:47,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 990 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 950 Invalid, 0 Unknown, 231 Unchecked, 0.4s Time] [2022-07-20 05:20:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-07-20 05:20:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 902. [2022-07-20 05:20:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.1077777777777778) internal successors, (997), 901 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 997 transitions. [2022-07-20 05:20:47,092 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 997 transitions. Word has length 73 [2022-07-20 05:20:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:47,092 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 997 transitions. [2022-07-20 05:20:47,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 997 transitions. [2022-07-20 05:20:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 05:20:47,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:47,094 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:47,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:47,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:47,309 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:47,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 10 times [2022-07-20 05:20:47,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:47,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283003754] [2022-07-20 05:20:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:47,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:47,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:47,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283003754] [2022-07-20 05:20:47,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283003754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:47,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314476617] [2022-07-20 05:20:47,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:20:47,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:47,572 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:47,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:20:47,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:20:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 05:20:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:47,704 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:47,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:48,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:20:48,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:48,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 05:20:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 86 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:48,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:48,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-20 05:20:48,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-07-20 05:20:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 77 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:49,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314476617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:49,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:49,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 55 [2022-07-20 05:20:49,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810923125] [2022-07-20 05:20:49,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:49,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-20 05:20:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-20 05:20:49,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 05:20:49,376 INFO L87 Difference]: Start difference. First operand 902 states and 997 transitions. Second operand has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:50,239 INFO L93 Difference]: Finished difference Result 1059 states and 1164 transitions. [2022-07-20 05:20:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 05:20:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 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 76 [2022-07-20 05:20:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:50,242 INFO L225 Difference]: With dead ends: 1059 [2022-07-20 05:20:50,242 INFO L226 Difference]: Without dead ends: 1013 [2022-07-20 05:20:50,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=695, Invalid=5947, Unknown=0, NotChecked=0, Total=6642 [2022-07-20 05:20:50,243 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 161 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:50,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1247 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 677 Invalid, 0 Unknown, 358 Unchecked, 0.2s Time] [2022-07-20 05:20:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-07-20 05:20:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 988. [2022-07-20 05:20:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 986 states have (on average 1.1085192697768762) internal successors, (1093), 987 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1093 transitions. [2022-07-20 05:20:50,255 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1093 transitions. Word has length 76 [2022-07-20 05:20:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:50,255 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 1093 transitions. [2022-07-20 05:20:50,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1093 transitions. [2022-07-20 05:20:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 05:20:50,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:50,257 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:50,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:50,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 05:20:50,471 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2129461782, now seen corresponding path program 4 times [2022-07-20 05:20:50,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:50,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8656873] [2022-07-20 05:20:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:50,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:20:50,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:50,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8656873] [2022-07-20 05:20:50,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8656873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:50,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333961465] [2022-07-20 05:20:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:20:50,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:50,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:50,600 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:50,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:20:50,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:20:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:50,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-20 05:20:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:50,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:50,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:20:50,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:20:51,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-20 05:20:52,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:52,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:52,377 INFO L356 Elim1Store]: treesize reduction 3, result has 96.3 percent of original size [2022-07-20 05:20:52,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 101 [2022-07-20 05:20:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:20:52,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:54,185 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_865 (Array Int Int)) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_865))) (let ((.cse2 (select (select .cse3 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146|)) (.cse0 (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_865 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 1)) .cse1)) (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 2)) .cse2)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) (not (<= 0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|)) (= .cse2 0) (<= (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= (select .cse0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) .cse1)) (= .cse1 0))))) is different from false [2022-07-20 05:20:54,201 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:54,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 70 [2022-07-20 05:20:54,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:54,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:54,246 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:54,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 171 treesize of output 218 [2022-07-20 05:20:54,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:54,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:54,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:54,285 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:54,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 123 treesize of output 157 [2022-07-20 05:20:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:20:56,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333961465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:56,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:56,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 32, 32] total 72 [2022-07-20 05:20:56,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593669625] [2022-07-20 05:20:56,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:56,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 05:20:56,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 05:20:56,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=4367, Unknown=1, NotChecked=140, Total=5256 [2022-07-20 05:20:56,203 INFO L87 Difference]: Start difference. First operand 988 states and 1093 transitions. Second operand has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 73 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:57,145 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (= (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~length1~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_865 (Array Int Int)) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_865))) (let ((.cse2 (select (select .cse3 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146|)) (.cse0 (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_865 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 1)) .cse1)) (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 2)) .cse2)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) (not (<= 0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|)) (= .cse2 0) (<= (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= (select .cse0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) .cse1)) (= .cse1 0))))) (not (< |c_ULTIMATE.start_main_~length1~0#1| 1))) is different from false [2022-07-20 05:21:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:00,825 INFO L93 Difference]: Finished difference Result 1481 states and 1630 transitions. [2022-07-20 05:21:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-20 05:21:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 73 states have internal predecessors, (208), 0 states have call successors, (0), 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 77 [2022-07-20 05:21:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:00,829 INFO L225 Difference]: With dead ends: 1481 [2022-07-20 05:21:00,829 INFO L226 Difference]: Without dead ends: 1481 [2022-07-20 05:21:00,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 6451 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3734, Invalid=17442, Unknown=2, NotChecked=578, Total=21756 [2022-07-20 05:21:00,831 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 582 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1670 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:00,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 807 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 582 Invalid, 0 Unknown, 1670 Unchecked, 0.3s Time] [2022-07-20 05:21:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-07-20 05:21:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1185. [2022-07-20 05:21:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1183 states have (on average 1.1048182586644124) internal successors, (1307), 1184 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1307 transitions. [2022-07-20 05:21:00,846 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1307 transitions. Word has length 77 [2022-07-20 05:21:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:00,847 INFO L495 AbstractCegarLoop]: Abstraction has 1185 states and 1307 transitions. [2022-07-20 05:21:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 73 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1307 transitions. [2022-07-20 05:21:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 05:21:00,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:00,849 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:00,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-20 05:21:01,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-20 05:21:01,073 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1548843218, now seen corresponding path program 5 times [2022-07-20 05:21:01,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:01,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576002514] [2022-07-20 05:21:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:01,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:01,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576002514] [2022-07-20 05:21:01,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576002514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:01,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781413798] [2022-07-20 05:21:01,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:21:01,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:01,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:01,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:01,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:21:01,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:21:01,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-20 05:21:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:01,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:01,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:21:01,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:21:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:01,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:01,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781413798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:01,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:01,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-07-20 05:21:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803769615] [2022-07-20 05:21:01,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:01,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 05:21:01,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 05:21:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:21:01,894 INFO L87 Difference]: Start difference. First operand 1185 states and 1307 transitions. Second operand has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:02,257 INFO L93 Difference]: Finished difference Result 1796 states and 1991 transitions. [2022-07-20 05:21:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:21:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 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 77 [2022-07-20 05:21:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:02,261 INFO L225 Difference]: With dead ends: 1796 [2022-07-20 05:21:02,261 INFO L226 Difference]: Without dead ends: 1796 [2022-07-20 05:21:02,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:21:02,261 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 383 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:02,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 476 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:21:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-07-20 05:21:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1348. [2022-07-20 05:21:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1346 states have (on average 1.1084695393759287) internal successors, (1492), 1347 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1492 transitions. [2022-07-20 05:21:02,278 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1492 transitions. Word has length 77 [2022-07-20 05:21:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:02,278 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1492 transitions. [2022-07-20 05:21:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1492 transitions. [2022-07-20 05:21:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 05:21:02,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:02,280 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:02,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-20 05:21:02,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:02,498 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:02,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203680, now seen corresponding path program 4 times [2022-07-20 05:21:02,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:02,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840599407] [2022-07-20 05:21:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:02,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840599407] [2022-07-20 05:21:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840599407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807322509] [2022-07-20 05:21:03,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:21:03,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:03,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:03,036 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:03,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:21:03,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:21:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:21:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:03,151 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:03,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:21:03,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:21:03,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:03,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 05:21:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 65 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:03,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:04,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-20 05:21:04,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-07-20 05:21:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 37 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:04,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807322509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:04,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:04,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 48 [2022-07-20 05:21:04,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492426593] [2022-07-20 05:21:04,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:04,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 05:21:04,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 05:21:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:21:04,580 INFO L87 Difference]: Start difference. First operand 1348 states and 1492 transitions. Second operand has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:06,482 INFO L93 Difference]: Finished difference Result 1374 states and 1508 transitions. [2022-07-20 05:21:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 05:21:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 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 79 [2022-07-20 05:21:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:06,486 INFO L225 Difference]: With dead ends: 1374 [2022-07-20 05:21:06,486 INFO L226 Difference]: Without dead ends: 1311 [2022-07-20 05:21:06,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=740, Invalid=6742, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 05:21:06,487 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 329 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:06,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 892 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 708 Invalid, 0 Unknown, 229 Unchecked, 0.3s Time] [2022-07-20 05:21:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-07-20 05:21:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1216. [2022-07-20 05:21:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1214 states have (on average 1.1054365733113674) internal successors, (1342), 1215 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1342 transitions. [2022-07-20 05:21:06,500 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1342 transitions. Word has length 79 [2022-07-20 05:21:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:06,501 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 1342 transitions. [2022-07-20 05:21:06,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1342 transitions. [2022-07-20 05:21:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 05:21:06,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:06,503 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:06,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:06,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:06,727 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash -882077113, now seen corresponding path program 11 times [2022-07-20 05:21:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:06,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597439016] [2022-07-20 05:21:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:06,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597439016] [2022-07-20 05:21:06,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597439016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854378499] [2022-07-20 05:21:06,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:21:06,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:06,959 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:06,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:21:07,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:21:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:07,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 05:21:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:07,080 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:07,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:21:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:07,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:07,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854378499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:07,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:07,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-20 05:21:07,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188266776] [2022-07-20 05:21:07,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:07,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 05:21:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:07,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 05:21:07,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:21:07,973 INFO L87 Difference]: Start difference. First operand 1216 states and 1342 transitions. Second operand has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:09,162 INFO L93 Difference]: Finished difference Result 1788 states and 1952 transitions. [2022-07-20 05:21:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 05:21:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 states have internal predecessors, (222), 0 states have call successors, (0), 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 80 [2022-07-20 05:21:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:09,166 INFO L225 Difference]: With dead ends: 1788 [2022-07-20 05:21:09,166 INFO L226 Difference]: Without dead ends: 1788 [2022-07-20 05:21:09,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=922, Invalid=3500, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 05:21:09,167 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 544 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:09,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1427 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:21:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2022-07-20 05:21:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1471. [2022-07-20 05:21:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1469 states have (on average 1.1123213070115725) internal successors, (1634), 1470 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1634 transitions. [2022-07-20 05:21:09,184 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1634 transitions. Word has length 80 [2022-07-20 05:21:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:09,185 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 1634 transitions. [2022-07-20 05:21:09,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1634 transitions. [2022-07-20 05:21:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-20 05:21:09,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:09,187 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:09,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:09,412 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 12 times [2022-07-20 05:21:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:09,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333700285] [2022-07-20 05:21:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:09,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333700285] [2022-07-20 05:21:09,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333700285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325211695] [2022-07-20 05:21:09,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:21:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:09,689 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:09,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:21:09,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 05:21:09,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:09,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:21:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:09,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:21:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:10,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:10,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:21:10,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:21:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:10,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325211695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:10,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:10,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 42 [2022-07-20 05:21:10,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721860691] [2022-07-20 05:21:10,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:10,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 05:21:10,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 05:21:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 05:21:10,426 INFO L87 Difference]: Start difference. First operand 1471 states and 1634 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:11,561 INFO L93 Difference]: Finished difference Result 2070 states and 2262 transitions. [2022-07-20 05:21:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:21:11,561 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 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 86 [2022-07-20 05:21:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:11,565 INFO L225 Difference]: With dead ends: 2070 [2022-07-20 05:21:11,565 INFO L226 Difference]: Without dead ends: 1933 [2022-07-20 05:21:11,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=417, Invalid=3243, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 05:21:11,566 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 833 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:11,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 2509 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2050 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-07-20 05:21:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-07-20 05:21:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1728. [2022-07-20 05:21:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1726 states have (on average 1.1123986095017382) internal successors, (1920), 1727 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 1920 transitions. [2022-07-20 05:21:11,583 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 1920 transitions. Word has length 86 [2022-07-20 05:21:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:11,583 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 1920 transitions. [2022-07-20 05:21:11,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 1920 transitions. [2022-07-20 05:21:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 05:21:11,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:11,586 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:11,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:11,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-20 05:21:11,790 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1004507895, now seen corresponding path program 5 times [2022-07-20 05:21:11,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:11,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638500873] [2022-07-20 05:21:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:11,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:12,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:12,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638500873] [2022-07-20 05:21:12,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638500873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:12,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141631562] [2022-07-20 05:21:12,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:21:12,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:12,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:12,024 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:12,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:21:12,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 05:21:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 05:21:12,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:12,155 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:12,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:21:12,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:21:12,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:12,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-20 05:21:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 142 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:12,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:13,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:21:13,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:21:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 129 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:13,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141631562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:13,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:13,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2022-07-20 05:21:13,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458041059] [2022-07-20 05:21:13,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:13,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 05:21:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 05:21:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2530, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 05:21:13,887 INFO L87 Difference]: Start difference. First operand 1728 states and 1920 transitions. Second operand has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:15,172 INFO L93 Difference]: Finished difference Result 1873 states and 2052 transitions. [2022-07-20 05:21:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:21:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 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 89 [2022-07-20 05:21:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:15,176 INFO L225 Difference]: With dead ends: 1873 [2022-07-20 05:21:15,176 INFO L226 Difference]: Without dead ends: 1797 [2022-07-20 05:21:15,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=657, Invalid=6315, Unknown=0, NotChecked=0, Total=6972 [2022-07-20 05:21:15,177 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 469 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:15,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1483 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1061 Invalid, 0 Unknown, 242 Unchecked, 0.4s Time] [2022-07-20 05:21:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-07-20 05:21:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1572. [2022-07-20 05:21:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1570 states have (on average 1.1095541401273885) internal successors, (1742), 1571 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 1742 transitions. [2022-07-20 05:21:15,194 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 1742 transitions. Word has length 89 [2022-07-20 05:21:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:15,194 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 1742 transitions. [2022-07-20 05:21:15,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 1742 transitions. [2022-07-20 05:21:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 05:21:15,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:15,196 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:15,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:15,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 05:21:15,410 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 13 times [2022-07-20 05:21:15,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:15,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771721980] [2022-07-20 05:21:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:15,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:15,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:15,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771721980] [2022-07-20 05:21:15,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771721980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:15,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664151972] [2022-07-20 05:21:15,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:21:15,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:15,692 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:15,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:21:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:15,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 05:21:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:16,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:16,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-20 05:21:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:16,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664151972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:16,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:16,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 42 [2022-07-20 05:21:16,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142016243] [2022-07-20 05:21:16,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:16,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:21:16,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:21:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:21:16,582 INFO L87 Difference]: Start difference. First operand 1572 states and 1742 transitions. Second operand has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:18,179 INFO L93 Difference]: Finished difference Result 1930 states and 2106 transitions. [2022-07-20 05:21:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:21:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 states have internal predecessors, (188), 0 states have call successors, (0), 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 90 [2022-07-20 05:21:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:18,183 INFO L225 Difference]: With dead ends: 1930 [2022-07-20 05:21:18,183 INFO L226 Difference]: Without dead ends: 1930 [2022-07-20 05:21:18,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=813, Invalid=3477, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 05:21:18,184 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 883 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:18,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 1737 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:21:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-07-20 05:21:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1614. [2022-07-20 05:21:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.1104218362282878) internal successors, (1790), 1613 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 1790 transitions. [2022-07-20 05:21:18,206 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 1790 transitions. Word has length 90 [2022-07-20 05:21:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:18,206 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 1790 transitions. [2022-07-20 05:21:18,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 1790 transitions. [2022-07-20 05:21:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 05:21:18,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:18,208 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:18,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:18,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-20 05:21:18,414 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash 718300283, now seen corresponding path program 6 times [2022-07-20 05:21:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:18,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386175235] [2022-07-20 05:21:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:21:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386175235] [2022-07-20 05:21:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386175235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888014913] [2022-07-20 05:21:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:21:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:19,058 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:19,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:21:19,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 05:21:19,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-20 05:21:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:19,210 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:19,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:21:19,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:21:19,551 INFO L356 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2022-07-20 05:21:19,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 05:21:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:20,500 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-07-20 05:21:20,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2022-07-20 05:21:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:20,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:21,745 INFO L356 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2022-07-20 05:21:21,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 412 treesize of output 368 [2022-07-20 05:21:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:22,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888014913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:22,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:22,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 21] total 66 [2022-07-20 05:21:22,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152409834] [2022-07-20 05:21:22,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:22,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 05:21:22,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 05:21:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=4076, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 05:21:22,684 INFO L87 Difference]: Start difference. First operand 1614 states and 1790 transitions. Second operand has 66 states, 66 states have (on average 3.590909090909091) internal successors, (237), 66 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:25,366 INFO L93 Difference]: Finished difference Result 2337 states and 2565 transitions. [2022-07-20 05:21:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 05:21:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.590909090909091) internal successors, (237), 66 states have internal predecessors, (237), 0 states have call successors, (0), 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 90 [2022-07-20 05:21:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:25,371 INFO L225 Difference]: With dead ends: 2337 [2022-07-20 05:21:25,371 INFO L226 Difference]: Without dead ends: 2259 [2022-07-20 05:21:25,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=545, Invalid=9961, Unknown=0, NotChecked=0, Total=10506 [2022-07-20 05:21:25,372 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 150 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1246 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:25,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 2045 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 975 Invalid, 0 Unknown, 1246 Unchecked, 0.4s Time] [2022-07-20 05:21:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-07-20 05:21:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2256. [2022-07-20 05:21:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2254 states have (on average 1.1020408163265305) internal successors, (2484), 2255 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 2484 transitions. [2022-07-20 05:21:25,391 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 2484 transitions. Word has length 90 [2022-07-20 05:21:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:25,391 INFO L495 AbstractCegarLoop]: Abstraction has 2256 states and 2484 transitions. [2022-07-20 05:21:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.590909090909091) internal successors, (237), 66 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 2484 transitions. [2022-07-20 05:21:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 05:21:25,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:25,394 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:25,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:25,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:25,595 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash -402551453, now seen corresponding path program 7 times [2022-07-20 05:21:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751322363] [2022-07-20 05:21:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:25,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:21:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:26,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751322363] [2022-07-20 05:21:26,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751322363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:26,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613651195] [2022-07-20 05:21:26,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:21:26,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:26,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:26,233 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:26,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:21:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-20 05:21:26,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:26,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:21:26,717 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:26,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-20 05:21:26,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 3 [2022-07-20 05:21:33,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:33,428 INFO L356 Elim1Store]: treesize reduction 33, result has 46.8 percent of original size [2022-07-20 05:21:33,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 98 [2022-07-20 05:21:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:21:33,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:36,714 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:36,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 172 [2022-07-20 05:21:36,771 INFO L356 Elim1Store]: treesize reduction 21, result has 71.2 percent of original size [2022-07-20 05:21:36,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 361 treesize of output 343 [2022-07-20 05:21:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:36,803 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:36,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 293 treesize of output 291 [2022-07-20 05:21:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 15 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:21:38,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613651195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:38,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:38,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32, 32] total 86 [2022-07-20 05:21:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372366351] [2022-07-20 05:21:38,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:38,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 05:21:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 05:21:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=6954, Unknown=9, NotChecked=0, Total=7310 [2022-07-20 05:21:38,240 INFO L87 Difference]: Start difference. First operand 2256 states and 2484 transitions. Second operand has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:43,397 INFO L93 Difference]: Finished difference Result 3800 states and 4174 transitions. [2022-07-20 05:21:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-20 05:21:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 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 90 [2022-07-20 05:21:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:43,407 INFO L225 Difference]: With dead ends: 3800 [2022-07-20 05:21:43,407 INFO L226 Difference]: Without dead ends: 3754 [2022-07-20 05:21:43,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1011, Invalid=19860, Unknown=9, NotChecked=0, Total=20880 [2022-07-20 05:21:43,409 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 253 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 3988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1612 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:43,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 2184 Invalid, 3988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2323 Invalid, 0 Unknown, 1612 Unchecked, 1.0s Time] [2022-07-20 05:21:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-07-20 05:21:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2747. [2022-07-20 05:21:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2745 states have (on average 1.107832422586521) internal successors, (3041), 2746 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3041 transitions. [2022-07-20 05:21:43,434 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3041 transitions. Word has length 90 [2022-07-20 05:21:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:43,435 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 3041 transitions. [2022-07-20 05:21:43,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3041 transitions. [2022-07-20 05:21:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 05:21:43,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:43,439 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:43,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:43,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-20 05:21:43,659 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash 422434722, now seen corresponding path program 6 times [2022-07-20 05:21:43,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:43,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565279621] [2022-07-20 05:21:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:43,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:43,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:43,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565279621] [2022-07-20 05:21:43,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565279621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:43,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747287527] [2022-07-20 05:21:43,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:21:43,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:43,951 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:43,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:21:44,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-20 05:21:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:21:44,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:44,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:21:44,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:21:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:44,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:44,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:21:44,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:21:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:44,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747287527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:44,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:44,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 37 [2022-07-20 05:21:44,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041396359] [2022-07-20 05:21:44,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:21:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:21:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:21:44,722 INFO L87 Difference]: Start difference. First operand 2747 states and 3041 transitions. Second operand has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:45,701 INFO L93 Difference]: Finished difference Result 2947 states and 3214 transitions. [2022-07-20 05:21:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:21:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-20 05:21:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:45,706 INFO L225 Difference]: With dead ends: 2947 [2022-07-20 05:21:45,707 INFO L226 Difference]: Without dead ends: 2829 [2022-07-20 05:21:45,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 05:21:45,707 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 484 mSDsluCounter, 2101 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:45,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 2218 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1703 Invalid, 0 Unknown, 172 Unchecked, 0.6s Time] [2022-07-20 05:21:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2022-07-20 05:21:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2654. [2022-07-20 05:21:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2652 states have (on average 1.1018099547511313) internal successors, (2922), 2653 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 2922 transitions. [2022-07-20 05:21:45,736 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 2922 transitions. Word has length 93 [2022-07-20 05:21:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:45,736 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 2922 transitions. [2022-07-20 05:21:45,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 2922 transitions. [2022-07-20 05:21:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-20 05:21:45,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:45,740 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:45,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-20 05:21:45,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-20 05:21:45,959 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 695913816, now seen corresponding path program 8 times [2022-07-20 05:21:45,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:45,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8069470] [2022-07-20 05:21:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:45,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:46,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8069470] [2022-07-20 05:21:46,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8069470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854537622] [2022-07-20 05:21:46,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:46,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:46,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:46,115 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:46,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:21:46,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 05:21:46,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:46,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:46,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 18 [2022-07-20 05:21:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:46,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854537622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:46,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:46,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-20 05:21:46,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770559667] [2022-07-20 05:21:46,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:46,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:21:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:21:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:21:46,951 INFO L87 Difference]: Start difference. First operand 2654 states and 2922 transitions. Second operand has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:47,397 INFO L93 Difference]: Finished difference Result 3892 states and 4290 transitions. [2022-07-20 05:21:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:21:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 states have internal predecessors, (206), 0 states have call successors, (0), 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 94 [2022-07-20 05:21:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:47,403 INFO L225 Difference]: With dead ends: 3892 [2022-07-20 05:21:47,403 INFO L226 Difference]: Without dead ends: 3892 [2022-07-20 05:21:47,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 05:21:47,404 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 760 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:47,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 760 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:21:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2022-07-20 05:21:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 2865. [2022-07-20 05:21:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2863 states have (on average 1.1026894865525672) internal successors, (3157), 2864 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3157 transitions. [2022-07-20 05:21:47,437 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3157 transitions. Word has length 94 [2022-07-20 05:21:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:47,437 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3157 transitions. [2022-07-20 05:21:47,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3157 transitions. [2022-07-20 05:21:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 05:21:47,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:47,441 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:47,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:47,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-20 05:21:47,663 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -737545652, now seen corresponding path program 14 times [2022-07-20 05:21:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:47,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66818139] [2022-07-20 05:21:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66818139] [2022-07-20 05:21:47,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66818139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:47,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188048940] [2022-07-20 05:21:47,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:47,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:47,999 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:48,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:21:48,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:48,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:48,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 05:21:48,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:48,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:21:49,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:49,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-20 05:21:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:49,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:50,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:21:50,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:21:50,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:21:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:50,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188048940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:50,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:50,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-07-20 05:21:50,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488452034] [2022-07-20 05:21:50,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:50,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 05:21:50,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:50,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 05:21:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 05:21:50,177 INFO L87 Difference]: Start difference. First operand 2865 states and 3157 transitions. Second operand has 63 states, 63 states have (on average 3.857142857142857) internal successors, (243), 63 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:52,907 INFO L93 Difference]: Finished difference Result 3329 states and 3639 transitions. [2022-07-20 05:21:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 05:21:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.857142857142857) internal successors, (243), 63 states have internal predecessors, (243), 0 states have call successors, (0), 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 96 [2022-07-20 05:21:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:52,916 INFO L225 Difference]: With dead ends: 3329 [2022-07-20 05:21:52,917 INFO L226 Difference]: Without dead ends: 3268 [2022-07-20 05:21:52,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=506, Invalid=5974, Unknown=0, NotChecked=0, Total=6480 [2022-07-20 05:21:52,918 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 751 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 3774 SdHoareTripleChecker+Invalid, 4199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1967 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:52,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 3774 Invalid, 4199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2222 Invalid, 0 Unknown, 1967 Unchecked, 0.8s Time] [2022-07-20 05:21:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2022-07-20 05:21:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 3056. [2022-07-20 05:21:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3054 states have (on average 1.1041257367387034) internal successors, (3372), 3055 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 3372 transitions. [2022-07-20 05:21:52,949 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 3372 transitions. Word has length 96 [2022-07-20 05:21:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:52,949 INFO L495 AbstractCegarLoop]: Abstraction has 3056 states and 3372 transitions. [2022-07-20 05:21:52,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.857142857142857) internal successors, (243), 63 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 3372 transitions. [2022-07-20 05:21:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 05:21:52,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:52,953 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:52,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:53,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:53,179 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:53,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:53,179 INFO L85 PathProgramCache]: Analyzing trace with hash 281182567, now seen corresponding path program 9 times [2022-07-20 05:21:53,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:53,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070696928] [2022-07-20 05:21:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:53,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 7 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:54,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:54,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070696928] [2022-07-20 05:21:54,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070696928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:54,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295458887] [2022-07-20 05:21:54,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:21:54,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:54,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:54,093 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:54,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:21:54,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 05:21:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:54,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-20 05:21:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:54,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:21:54,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:21:54,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:21:55,318 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-20 05:21:55,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2022-07-20 05:21:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 05:21:55,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:56,057 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrpbrk_~s~0#1.offset| Int) (v_ArrVal_1410 (Array Int Int)) (|ULTIMATE.start_cstrpbrk_~s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1410))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) |ULTIMATE.start_cstrpbrk_~s~0#1.offset|))) (or (= .cse0 0) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0)))))) is different from false [2022-07-20 05:21:56,062 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:56,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-20 05:21:56,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:56,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-20 05:21:56,084 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:56,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-20 05:21:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 7 proven. 137 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 05:21:56,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295458887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:56,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:56,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 20, 20] total 63 [2022-07-20 05:21:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159899290] [2022-07-20 05:21:56,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:56,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 05:21:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 05:21:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3600, Unknown=1, NotChecked=120, Total=3906 [2022-07-20 05:21:56,462 INFO L87 Difference]: Start difference. First operand 3056 states and 3372 transitions. Second operand has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:59,989 INFO L93 Difference]: Finished difference Result 3442 states and 3779 transitions. [2022-07-20 05:21:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 05:21:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 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 96 [2022-07-20 05:21:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:59,993 INFO L225 Difference]: With dead ends: 3442 [2022-07-20 05:21:59,993 INFO L226 Difference]: Without dead ends: 2384 [2022-07-20 05:21:59,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 5 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=764, Invalid=8941, Unknown=1, NotChecked=194, Total=9900 [2022-07-20 05:21:59,994 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 533 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 3526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1119 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:59,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 2758 Invalid, 3526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2302 Invalid, 0 Unknown, 1119 Unchecked, 0.9s Time] [2022-07-20 05:21:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2022-07-20 05:22:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2097. [2022-07-20 05:22:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2095 states have (on average 1.1093078758949881) internal successors, (2324), 2096 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2324 transitions. [2022-07-20 05:22:00,010 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2324 transitions. Word has length 96 [2022-07-20 05:22:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:00,010 INFO L495 AbstractCegarLoop]: Abstraction has 2097 states and 2324 transitions. [2022-07-20 05:22:00,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2324 transitions. [2022-07-20 05:22:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 05:22:00,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:00,012 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:00,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:00,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-20 05:22:00,213 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:00,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:00,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1737904387, now seen corresponding path program 15 times [2022-07-20 05:22:00,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:00,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057021937] [2022-07-20 05:22:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:00,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:00,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:00,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057021937] [2022-07-20 05:22:00,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057021937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594033986] [2022-07-20 05:22:00,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:22:00,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:00,622 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:00,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:22:00,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-20 05:22:00,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 05:22:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:01,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:22:01,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:22:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:01,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:01,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:22:01,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:22:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:01,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594033986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:01,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:01,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 46 [2022-07-20 05:22:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690157217] [2022-07-20 05:22:01,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:22:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:22:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:22:01,731 INFO L87 Difference]: Start difference. First operand 2097 states and 2324 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:03,602 INFO L93 Difference]: Finished difference Result 3718 states and 4092 transitions. [2022-07-20 05:22:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 05:22:03,602 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-20 05:22:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:03,606 INFO L225 Difference]: With dead ends: 3718 [2022-07-20 05:22:03,607 INFO L226 Difference]: Without dead ends: 3639 [2022-07-20 05:22:03,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=444, Invalid=4386, Unknown=0, NotChecked=0, Total=4830 [2022-07-20 05:22:03,608 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 995 mSDsluCounter, 4572 mSDsCounter, 0 mSdLazyCounter, 3511 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 4763 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:03,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 4763 Invalid, 3786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3511 Invalid, 0 Unknown, 151 Unchecked, 1.2s Time] [2022-07-20 05:22:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-07-20 05:22:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2749. [2022-07-20 05:22:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2747 states have (on average 1.113578449217328) internal successors, (3059), 2748 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 3059 transitions. [2022-07-20 05:22:03,640 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 3059 transitions. Word has length 106 [2022-07-20 05:22:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:03,640 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 3059 transitions. [2022-07-20 05:22:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 3059 transitions. [2022-07-20 05:22:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 05:22:03,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:03,644 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:03,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-20 05:22:03,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:03,859 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:03,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash -826314059, now seen corresponding path program 10 times [2022-07-20 05:22:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202019762] [2022-07-20 05:22:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:04,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:04,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202019762] [2022-07-20 05:22:04,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202019762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:04,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772498872] [2022-07-20 05:22:04,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:22:04,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:04,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:04,281 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:04,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:22:04,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:22:04,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:04,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-20 05:22:04,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:04,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:22:04,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:22:04,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:22:04,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:22:12,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:22:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:22:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:22:13,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:13,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 17 [2022-07-20 05:22:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 53 proven. 117 refuted. 17 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:13,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:14,330 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:14,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-07-20 05:22:14,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:14,340 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:14,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 75 [2022-07-20 05:22:14,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:14,362 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:14,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 56 [2022-07-20 05:22:15,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 117 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:15,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772498872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:15,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:15,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 28] total 71 [2022-07-20 05:22:15,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940199383] [2022-07-20 05:22:15,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 05:22:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 05:22:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=4589, Unknown=4, NotChecked=0, Total=4970 [2022-07-20 05:22:15,383 INFO L87 Difference]: Start difference. First operand 2749 states and 3059 transitions. Second operand has 71 states, 71 states have (on average 3.816901408450704) internal successors, (271), 71 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:48,938 INFO L93 Difference]: Finished difference Result 4220 states and 4655 transitions. [2022-07-20 05:22:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-20 05:22:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.816901408450704) internal successors, (271), 71 states have internal predecessors, (271), 0 states have call successors, (0), 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 107 [2022-07-20 05:22:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:48,944 INFO L225 Difference]: With dead ends: 4220 [2022-07-20 05:22:48,944 INFO L226 Difference]: Without dead ends: 4125 [2022-07-20 05:22:48,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 181 SyntacticMatches, 7 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4204 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=1604, Invalid=16747, Unknown=9, NotChecked=0, Total=18360 [2022-07-20 05:22:48,946 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 224 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:48,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1034 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 617 Invalid, 0 Unknown, 373 Unchecked, 0.2s Time] [2022-07-20 05:22:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-07-20 05:22:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3728. [2022-07-20 05:22:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3726 states have (on average 1.1092324208266238) internal successors, (4133), 3727 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 4133 transitions. [2022-07-20 05:22:48,992 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 4133 transitions. Word has length 107 [2022-07-20 05:22:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:48,993 INFO L495 AbstractCegarLoop]: Abstraction has 3728 states and 4133 transitions. [2022-07-20 05:22:48,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.816901408450704) internal successors, (271), 71 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 4133 transitions. [2022-07-20 05:22:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 05:22:48,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:48,997 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:49,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:49,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-20 05:22:49,203 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash -930670155, now seen corresponding path program 11 times [2022-07-20 05:22:49,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:49,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092990871] [2022-07-20 05:22:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:49,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092990871] [2022-07-20 05:22:49,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092990871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536295473] [2022-07-20 05:22:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:22:49,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:49,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:49,636 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:49,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 05:22:49,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:22:49,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:49,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-20 05:22:49,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:49,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:22:50,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:22:50,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:22:51,124 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:22:51,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-07-20 05:22:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 184 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:22:51,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:51,846 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrpbrk_~s2#1.offset| Int) (v_ArrVal_1560 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1560 |ULTIMATE.start_cstrpbrk_~s2#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1560) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0))))) is different from false [2022-07-20 05:22:51,851 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:51,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:22:51,856 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:51,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-20 05:22:51,865 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:51,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-07-20 05:22:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:52,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536295473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:52,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:52,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 56 [2022-07-20 05:22:52,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378829835] [2022-07-20 05:22:52,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 05:22:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 05:22:52,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2803, Unknown=2, NotChecked=106, Total=3080 [2022-07-20 05:22:52,124 INFO L87 Difference]: Start difference. First operand 3728 states and 4133 transitions. Second operand has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:52,942 INFO L93 Difference]: Finished difference Result 4440 states and 4896 transitions. [2022-07-20 05:22:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 05:22:52,943 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 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 107 [2022-07-20 05:22:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:52,948 INFO L225 Difference]: With dead ends: 4440 [2022-07-20 05:22:52,948 INFO L226 Difference]: Without dead ends: 4414 [2022-07-20 05:22:52,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 180 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=313, Invalid=4659, Unknown=2, NotChecked=138, Total=5112 [2022-07-20 05:22:52,949 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 70 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:52,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1241 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 714 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2022-07-20 05:22:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4414 states. [2022-07-20 05:22:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4414 to 4176. [2022-07-20 05:22:52,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 4174 states have (on average 1.1068519405845711) internal successors, (4620), 4175 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 4620 transitions. [2022-07-20 05:22:52,996 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 4620 transitions. Word has length 107 [2022-07-20 05:22:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:52,997 INFO L495 AbstractCegarLoop]: Abstraction has 4176 states and 4620 transitions. [2022-07-20 05:22:52,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 4620 transitions. [2022-07-20 05:22:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 05:22:53,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:53,001 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:53,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:53,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:53,215 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:53,216 INFO L85 PathProgramCache]: Analyzing trace with hash 460696013, now seen corresponding path program 12 times [2022-07-20 05:22:53,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:53,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501403842] [2022-07-20 05:22:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:53,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:53,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:53,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501403842] [2022-07-20 05:22:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501403842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832685318] [2022-07-20 05:22:53,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:22:53,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:53,618 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:53,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 05:22:53,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-20 05:22:53,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 05:22:53,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:53,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:22:54,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:22:54,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:22:54,576 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-20 05:22:54,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-20 05:22:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:54,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:54,914 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1606 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1606) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-20 05:22:54,919 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:54,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:22:54,923 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:54,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:22:54,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:22:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:55,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832685318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:55,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:55,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 52 [2022-07-20 05:22:55,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898618308] [2022-07-20 05:22:55,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:55,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 05:22:55,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 05:22:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2398, Unknown=1, NotChecked=98, Total=2652 [2022-07-20 05:22:55,161 INFO L87 Difference]: Start difference. First operand 4176 states and 4620 transitions. Second operand has 52 states, 52 states have (on average 4.153846153846154) internal successors, (216), 52 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:56,355 INFO L93 Difference]: Finished difference Result 5964 states and 6587 transitions. [2022-07-20 05:22:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 05:22:56,356 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.153846153846154) internal successors, (216), 52 states have internal predecessors, (216), 0 states have call successors, (0), 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 107 [2022-07-20 05:22:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:56,362 INFO L225 Difference]: With dead ends: 5964 [2022-07-20 05:22:56,362 INFO L226 Difference]: Without dead ends: 5936 [2022-07-20 05:22:56,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 181 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=297, Invalid=4536, Unknown=1, NotChecked=136, Total=4970 [2022-07-20 05:22:56,363 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 153 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:56,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1865 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1721 Invalid, 0 Unknown, 529 Unchecked, 0.6s Time] [2022-07-20 05:22:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2022-07-20 05:22:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 5191. [2022-07-20 05:22:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 5189 states have (on average 1.1088841780689922) internal successors, (5754), 5190 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 5754 transitions. [2022-07-20 05:22:56,415 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 5754 transitions. Word has length 107 [2022-07-20 05:22:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:56,415 INFO L495 AbstractCegarLoop]: Abstraction has 5191 states and 5754 transitions. [2022-07-20 05:22:56,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.153846153846154) internal successors, (216), 52 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 5754 transitions. [2022-07-20 05:22:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 05:22:56,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:56,421 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:56,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:56,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-20 05:22:56,647 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:56,648 INFO L85 PathProgramCache]: Analyzing trace with hash -23027046, now seen corresponding path program 16 times [2022-07-20 05:22:56,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:56,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794848200] [2022-07-20 05:22:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:56,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794848200] [2022-07-20 05:22:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794848200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:56,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558002602] [2022-07-20 05:22:56,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:22:56,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:56,993 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:56,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 05:22:57,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:22:57,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-20 05:22:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:57,149 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:57,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:22:57,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:22:57,964 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:57,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-20 05:22:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 128 proven. 250 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:58,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:59,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:22:59,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:23:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 153 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:00,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558002602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:00,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:00,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28, 28] total 69 [2022-07-20 05:23:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771657349] [2022-07-20 05:23:00,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-20 05:23:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:00,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-20 05:23:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=4319, Unknown=0, NotChecked=0, Total=4830 [2022-07-20 05:23:00,310 INFO L87 Difference]: Start difference. First operand 5191 states and 5754 transitions. Second operand has 70 states, 69 states have (on average 4.173913043478261) internal successors, (288), 70 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:04,534 INFO L93 Difference]: Finished difference Result 6612 states and 7307 transitions. [2022-07-20 05:23:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-20 05:23:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 4.173913043478261) internal successors, (288), 70 states have internal predecessors, (288), 0 states have call successors, (0), 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 110 [2022-07-20 05:23:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:04,539 INFO L225 Difference]: With dead ends: 6612 [2022-07-20 05:23:04,539 INFO L226 Difference]: Without dead ends: 6612 [2022-07-20 05:23:04,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2805, Invalid=11957, Unknown=0, NotChecked=0, Total=14762 [2022-07-20 05:23:04,540 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1423 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 4087 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 4390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:04,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 3105 Invalid, 4390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4087 Invalid, 0 Unknown, 176 Unchecked, 1.8s Time] [2022-07-20 05:23:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6612 states. [2022-07-20 05:23:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6612 to 5251. [2022-07-20 05:23:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5251 states, 5249 states have (on average 1.1091636502190894) internal successors, (5822), 5250 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5251 states to 5251 states and 5822 transitions. [2022-07-20 05:23:04,587 INFO L78 Accepts]: Start accepts. Automaton has 5251 states and 5822 transitions. Word has length 110 [2022-07-20 05:23:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:04,587 INFO L495 AbstractCegarLoop]: Abstraction has 5251 states and 5822 transitions. [2022-07-20 05:23:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 4.173913043478261) internal successors, (288), 70 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5251 states and 5822 transitions. [2022-07-20 05:23:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 05:23:04,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:04,594 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:04,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-20 05:23:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-20 05:23:04,803 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1356710024, now seen corresponding path program 13 times [2022-07-20 05:23:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494285104] [2022-07-20 05:23:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:23:04,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:04,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494285104] [2022-07-20 05:23:04,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494285104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:04,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132238055] [2022-07-20 05:23:04,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:23:04,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:04,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:04,986 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:04,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 05:23:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 05:23:05,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:05,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:23:05,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:23:05,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:23:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:23:05,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:23:06,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132238055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:06,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:06,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-07-20 05:23:06,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510115533] [2022-07-20 05:23:06,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:06,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:23:06,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:23:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:23:06,202 INFO L87 Difference]: Start difference. First operand 5251 states and 5822 transitions. Second operand has 40 states, 39 states have (on average 7.358974358974359) internal successors, (287), 40 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:07,167 INFO L93 Difference]: Finished difference Result 6779 states and 7510 transitions. [2022-07-20 05:23:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:23:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 7.358974358974359) internal successors, (287), 40 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-20 05:23:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:07,173 INFO L225 Difference]: With dead ends: 6779 [2022-07-20 05:23:07,173 INFO L226 Difference]: Without dead ends: 6779 [2022-07-20 05:23:07,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 05:23:07,174 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 923 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:07,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 956 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:23:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2022-07-20 05:23:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 5069. [2022-07-20 05:23:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5067 states have (on average 1.1103216893625418) internal successors, (5626), 5068 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 5626 transitions. [2022-07-20 05:23:07,222 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 5626 transitions. Word has length 111 [2022-07-20 05:23:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:07,222 INFO L495 AbstractCegarLoop]: Abstraction has 5069 states and 5626 transitions. [2022-07-20 05:23:07,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 7.358974358974359) internal successors, (287), 40 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 5626 transitions. [2022-07-20 05:23:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 05:23:07,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:07,227 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:07,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:07,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-20 05:23:07,427 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1542153008, now seen corresponding path program 7 times [2022-07-20 05:23:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:07,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908256070] [2022-07-20 05:23:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 33 proven. 285 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:07,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908256070] [2022-07-20 05:23:07,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908256070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:07,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472922529] [2022-07-20 05:23:07,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:23:07,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:07,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:07,788 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:07,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 05:23:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-20 05:23:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:08,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:23:08,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:23:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 33 proven. 285 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:08,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:08,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 05:23:08,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 22 [2022-07-20 05:23:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 33 proven. 285 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:08,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472922529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:08,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:08,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 43 [2022-07-20 05:23:08,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072922905] [2022-07-20 05:23:08,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:08,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:23:08,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:23:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:23:08,830 INFO L87 Difference]: Start difference. First operand 5069 states and 5626 transitions. Second operand has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:10,235 INFO L93 Difference]: Finished difference Result 6752 states and 7462 transitions. [2022-07-20 05:23:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 05:23:10,236 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 0 states have call successors, (0), 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 [2022-07-20 05:23:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:10,241 INFO L225 Difference]: With dead ends: 6752 [2022-07-20 05:23:10,241 INFO L226 Difference]: Without dead ends: 6670 [2022-07-20 05:23:10,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 204 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=405, Invalid=3627, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 05:23:10,241 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 782 mSDsluCounter, 3274 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:10,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 3447 Invalid, 2667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2324 Invalid, 0 Unknown, 304 Unchecked, 0.8s Time] [2022-07-20 05:23:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2022-07-20 05:23:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 5530. [2022-07-20 05:23:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 5528 states have (on average 1.11089001447178) internal successors, (6141), 5529 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 6141 transitions. [2022-07-20 05:23:10,291 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 6141 transitions. Word has length 113 [2022-07-20 05:23:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:10,291 INFO L495 AbstractCegarLoop]: Abstraction has 5530 states and 6141 transitions. [2022-07-20 05:23:10,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 6141 transitions. [2022-07-20 05:23:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 05:23:10,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:10,297 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:10,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:10,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-20 05:23:10,511 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1490582561, now seen corresponding path program 14 times [2022-07-20 05:23:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:10,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472161655] [2022-07-20 05:23:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 85 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:23:10,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472161655] [2022-07-20 05:23:10,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472161655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736769458] [2022-07-20 05:23:10,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:23:10,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:10,773 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:10,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 05:23:10,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:23:10,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-20 05:23:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:10,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:23:11,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:23:11,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:23:12,758 INFO L356 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-07-20 05:23:12,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2022-07-20 05:23:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 9 proven. 220 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:23:12,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:13,838 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1820 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1820) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse0 (select v_ArrVal_1820 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))) (or (not (= .cse0 (select .cse1 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse1 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0)) (= .cse0 0)))) is different from false [2022-07-20 05:23:13,845 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:13,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2022-07-20 05:23:13,860 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-20 05:23:13,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 81 [2022-07-20 05:23:13,876 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-07-20 05:23:13,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2022-07-20 05:23:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 28 proven. 201 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:23:14,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736769458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:14,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:14,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29, 30] total 71 [2022-07-20 05:23:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906845664] [2022-07-20 05:23:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 05:23:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 05:23:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=4513, Unknown=1, NotChecked=136, Total=4970 [2022-07-20 05:23:14,356 INFO L87 Difference]: Start difference. First operand 5530 states and 6141 transitions. Second operand has 71 states, 71 states have (on average 4.295774647887324) internal successors, (305), 71 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:15,247 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) .cse0 (forall ((v_ArrVal_1820 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1820) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_1820 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))) (or (not (= .cse1 (select .cse2 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse2 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= .cse1 0)))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (or (and .cse0 (= 4 |c_ULTIMATE.start_main_~length1~0#1|)) (and .cse0 (= 5 |c_ULTIMATE.start_main_~length1~0#1|))))) is different from false [2022-07-20 05:23:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:15,880 INFO L93 Difference]: Finished difference Result 5368 states and 5901 transitions. [2022-07-20 05:23:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 05:23:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.295774647887324) internal successors, (305), 71 states have internal predecessors, (305), 0 states have call successors, (0), 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 [2022-07-20 05:23:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:15,883 INFO L225 Difference]: With dead ends: 5368 [2022-07-20 05:23:15,883 INFO L226 Difference]: Without dead ends: 3989 [2022-07-20 05:23:15,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=598, Invalid=8720, Unknown=2, NotChecked=382, Total=9702 [2022-07-20 05:23:15,884 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 203 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:15,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1821 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1042 Invalid, 0 Unknown, 562 Unchecked, 0.4s Time] [2022-07-20 05:23:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2022-07-20 05:23:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 2920. [2022-07-20 05:23:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2918 states have (on average 1.116860863605209) internal successors, (3259), 2919 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 3259 transitions. [2022-07-20 05:23:15,905 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 3259 transitions. Word has length 113 [2022-07-20 05:23:15,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:15,905 INFO L495 AbstractCegarLoop]: Abstraction has 2920 states and 3259 transitions. [2022-07-20 05:23:15,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.295774647887324) internal successors, (305), 71 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 3259 transitions. [2022-07-20 05:23:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-20 05:23:15,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:15,907 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:15,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:16,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-20 05:23:16,108 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:16,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1378974092, now seen corresponding path program 3 times [2022-07-20 05:23:16,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660846769] [2022-07-20 05:23:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:16,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:16,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660846769] [2022-07-20 05:23:16,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660846769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:16,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089408113] [2022-07-20 05:23:16,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:23:16,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:16,622 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:16,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 05:23:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 05:23:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:16,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-20 05:23:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:16,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:23:17,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:23:17,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:23:18,273 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-20 05:23:18,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2022-07-20 05:23:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:18,984 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1867 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1867) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:23:18,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:18,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:23:18,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:18,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:23:18,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:23:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:19,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089408113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:19,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:19,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 62 [2022-07-20 05:23:19,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131021525] [2022-07-20 05:23:19,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:19,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 05:23:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 05:23:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3488, Unknown=1, NotChecked=118, Total=3782 [2022-07-20 05:23:19,300 INFO L87 Difference]: Start difference. First operand 2920 states and 3259 transitions. Second operand has 62 states, 62 states have (on average 4.870967741935484) internal successors, (302), 62 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:20,811 INFO L93 Difference]: Finished difference Result 4598 states and 5107 transitions. [2022-07-20 05:23:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 05:23:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.870967741935484) internal successors, (302), 62 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-20 05:23:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:20,814 INFO L225 Difference]: With dead ends: 4598 [2022-07-20 05:23:20,815 INFO L226 Difference]: Without dead ends: 4502 [2022-07-20 05:23:20,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 187 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=327, Invalid=6816, Unknown=1, NotChecked=166, Total=7310 [2022-07-20 05:23:20,815 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 131 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1228 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:20,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 2931 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1350 Invalid, 0 Unknown, 1228 Unchecked, 0.5s Time] [2022-07-20 05:23:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2022-07-20 05:23:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 4448. [2022-07-20 05:23:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 4446 states have (on average 1.1151596941070625) internal successors, (4958), 4447 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 4958 transitions. [2022-07-20 05:23:20,843 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 4958 transitions. Word has length 114 [2022-07-20 05:23:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:20,843 INFO L495 AbstractCegarLoop]: Abstraction has 4448 states and 4958 transitions. [2022-07-20 05:23:20,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.870967741935484) internal successors, (302), 62 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 4958 transitions. [2022-07-20 05:23:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-20 05:23:20,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:20,847 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:20,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:21,048 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2003988115, now seen corresponding path program 8 times [2022-07-20 05:23:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152447381] [2022-07-20 05:23:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 66 proven. 281 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:21,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152447381] [2022-07-20 05:23:21,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152447381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571052340] [2022-07-20 05:23:21,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:23:21,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:21,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:21,393 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:21,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-20 05:23:21,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:23:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:21,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:23:21,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 91 proven. 256 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:21,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:22,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-20 05:23:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 91 proven. 256 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:22,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571052340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:22,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:22,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 46 [2022-07-20 05:23:22,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130440956] [2022-07-20 05:23:22,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:22,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 05:23:22,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 05:23:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 05:23:22,478 INFO L87 Difference]: Start difference. First operand 4448 states and 4958 transitions. Second operand has 47 states, 46 states have (on average 5.304347826086956) internal successors, (244), 47 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:24,247 INFO L93 Difference]: Finished difference Result 6344 states and 6972 transitions. [2022-07-20 05:23:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 05:23:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.304347826086956) internal successors, (244), 47 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-07-20 05:23:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:24,252 INFO L225 Difference]: With dead ends: 6344 [2022-07-20 05:23:24,252 INFO L226 Difference]: Without dead ends: 5963 [2022-07-20 05:23:24,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=994, Invalid=4262, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 05:23:24,253 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 930 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:24,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1600 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:23:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5963 states. [2022-07-20 05:23:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5963 to 4823. [2022-07-20 05:23:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4823 states, 4821 states have (on average 1.118855009334163) internal successors, (5394), 4822 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4823 states to 4823 states and 5394 transitions. [2022-07-20 05:23:24,295 INFO L78 Accepts]: Start accepts. Automaton has 4823 states and 5394 transitions. Word has length 117 [2022-07-20 05:23:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:24,295 INFO L495 AbstractCegarLoop]: Abstraction has 4823 states and 5394 transitions. [2022-07-20 05:23:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.304347826086956) internal successors, (244), 47 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 4823 states and 5394 transitions. [2022-07-20 05:23:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-20 05:23:24,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:24,298 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:24,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-07-20 05:23:24,499 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:24,499 INFO L85 PathProgramCache]: Analyzing trace with hash 802577257, now seen corresponding path program 4 times [2022-07-20 05:23:24,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:24,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323707513] [2022-07-20 05:23:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:24,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:24,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:24,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323707513] [2022-07-20 05:23:24,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323707513] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:24,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633715559] [2022-07-20 05:23:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:23:24,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:24,726 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:24,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-20 05:23:24,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:23:24,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-20 05:23:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:24,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:23:24,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 05:23:25,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:23:25,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-20 05:23:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:23:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:23:27,109 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:27,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 29 [2022-07-20 05:23:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 50 proven. 217 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:27,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:28,677 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1978 (Array Int Int)) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_188| Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1978) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_1978 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ 5 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_188|)) .cse1)) (not (<= 0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_188|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_188|) (<= (+ 7 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_188|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= (select .cse0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_188|) .cse1)) (= .cse1 0)))) is different from false [2022-07-20 05:23:28,686 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:28,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2022-07-20 05:23:28,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:23:28,697 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:28,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 79 [2022-07-20 05:23:28,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:23:28,709 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:28,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2022-07-20 05:23:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:30,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633715559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:30,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:30,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30, 31] total 75 [2022-07-20 05:23:30,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851798062] [2022-07-20 05:23:30,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:30,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-20 05:23:30,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:30,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-20 05:23:30,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=4960, Unknown=1, NotChecked=146, Total=5700 [2022-07-20 05:23:30,335 INFO L87 Difference]: Start difference. First operand 4823 states and 5394 transitions. Second operand has 76 states, 75 states have (on average 4.613333333333333) internal successors, (346), 76 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)