./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:30:21,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:30:21,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:30:21,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:30:21,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:30:21,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:30:21,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:30:21,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:30:21,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:30:21,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:30:21,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:30:21,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:30:21,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:30:21,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:30:21,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:30:21,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:30:21,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:30:21,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:30:21,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:30:21,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:30:21,390 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:30:21,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:30:21,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:30:21,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:30:21,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:30:21,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:30:21,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:30:21,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:30:21,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:30:21,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:30:21,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:30:21,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:30:21,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:30:21,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:30:21,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:30:21,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:30:21,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:30:21,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:30:21,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:30:21,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:30:21,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:30:21,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:30:21,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-07-12 18:30:21,436 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:30:21,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:30:21,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:30:21,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:30:21,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:30:21,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:30:21,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:30:21,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:30:21,438 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:30:21,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:30:21,439 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:30:21,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:30:21,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:30:21,440 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:30:21,440 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:30:21,440 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:30:21,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:30:21,441 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:30:21,441 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:30:21,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:30:21,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:30:21,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:30:21,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:30:21,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:30:21,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:30:21,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:30:21,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:30:21,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2022-07-12 18:30:21,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:30:21,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:30:21,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:30:21,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:30:21,680 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:30:21,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-07-12 18:30:21,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be2b0e572/5648fd9bc42942ccbea116fa6745222c/FLAG0dd8e9871 [2022-07-12 18:30:22,066 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:30:22,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-07-12 18:30:22,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be2b0e572/5648fd9bc42942ccbea116fa6745222c/FLAG0dd8e9871 [2022-07-12 18:30:22,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be2b0e572/5648fd9bc42942ccbea116fa6745222c [2022-07-12 18:30:22,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:30:22,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:30:22,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:30:22,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:30:22,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:30:22,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500d9bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22, skipping insertion in model container [2022-07-12 18:30:22,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:30:22,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:30:22,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:30:22,646 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:30:22,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:30:22,669 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:30:22,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22 WrapperNode [2022-07-12 18:30:22,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:30:22,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:30:22,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:30:22,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:30:22,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,698 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-07-12 18:30:22,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:30:22,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:30:22,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:30:22,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:30:22,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:30:22,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:30:22,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:30:22,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:30:22,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (1/1) ... [2022-07-12 18:30:22,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:30:22,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:22,752 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) [2022-07-12 18:30:22,757 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 [2022-07-12 18:30:22,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:30:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:30:22,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:30:22,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:30:22,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:30:22,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:30:22,845 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:30:22,847 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:30:22,968 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:30:22,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:30:22,974 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:30:22,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:30:22 BoogieIcfgContainer [2022-07-12 18:30:22,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:30:22,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:30:22,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:30:22,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:30:22,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:30:22" (1/3) ... [2022-07-12 18:30:22,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeac7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:30:22, skipping insertion in model container [2022-07-12 18:30:22,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:22" (2/3) ... [2022-07-12 18:30:22,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeac7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:30:22, skipping insertion in model container [2022-07-12 18:30:22,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:30:22" (3/3) ... [2022-07-12 18:30:22,983 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2022-07-12 18:30:22,995 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:30:22,996 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-07-12 18:30:23,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:30:23,038 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@2a30a782, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@53114d3a [2022-07-12 18:30:23,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-07-12 18:30:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 18:30:23,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:23,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 18:30:23,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-12 18:30:23,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:23,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168968243] [2022-07-12 18:30:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:23,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:23,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:23,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168968243] [2022-07-12 18:30:23,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168968243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:23,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:23,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:30:23,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975958524] [2022-07-12 18:30:23,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:23,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:30:23,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:30:23,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:23,322 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:23,395 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-07-12 18:30:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:30:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-12 18:30:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:23,404 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:30:23,405 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 18:30:23,407 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 [2022-07-12 18:30:23,414 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:23,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:30:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 18:30:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-07-12 18:30:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-12 18:30:23,449 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 4 [2022-07-12 18:30:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:23,450 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-12 18:30:23,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-12 18:30:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 18:30:23,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:23,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 18:30:23,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:30:23,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-12 18:30:23,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:23,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817406793] [2022-07-12 18:30:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:23,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817406793] [2022-07-12 18:30:23,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817406793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:23,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:23,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:30:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390878013] [2022-07-12 18:30:23,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:30:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:30:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:23,510 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:23,536 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-07-12 18:30:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:30:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-12 18:30:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:23,538 INFO L225 Difference]: With dead ends: 41 [2022-07-12 18:30:23,538 INFO L226 Difference]: Without dead ends: 41 [2022-07-12 18:30:23,539 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 [2022-07-12 18:30:23,540 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:23,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:30:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-12 18:30:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-07-12 18:30:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-07-12 18:30:23,546 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 4 [2022-07-12 18:30:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:23,546 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-07-12 18:30:23,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-07-12 18:30:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:30:23,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:23,547 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:23,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:30:23,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-12 18:30:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:23,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5631104] [2022-07-12 18:30:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:23,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5631104] [2022-07-12 18:30:23,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5631104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576656563] [2022-07-12 18:30:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:23,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:23,672 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) [2022-07-12 18:30:23,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:30:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:23,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:30:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:23,799 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:30:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:23,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:23,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576656563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:23,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:23,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-07-12 18:30:23,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88858177] [2022-07-12 18:30:23,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:23,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:30:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:30:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:30:23,994 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2022-07-12 18:30:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:24,123 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-12 18:30:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:30:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 8 [2022-07-12 18:30:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:24,126 INFO L225 Difference]: With dead ends: 49 [2022-07-12 18:30:24,126 INFO L226 Difference]: Without dead ends: 49 [2022-07-12 18:30:24,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:30:24,131 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:24,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 100 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:30:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-12 18:30:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-12 18:30:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.425) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 18:30:24,148 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 8 [2022-07-12 18:30:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:24,148 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 18:30:24,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2022-07-12 18:30:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 18:30:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:30:24,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:24,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:24,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 18:30:24,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:24,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash 868179552, now seen corresponding path program 1 times [2022-07-12 18:30:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:24,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77743247] [2022-07-12 18:30:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:24,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:30:24,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:24,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77743247] [2022-07-12 18:30:24,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77743247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:24,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336707547] [2022-07-12 18:30:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:24,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:24,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:24,454 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) [2022-07-12 18:30:24,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:30:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:30:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:24,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:24,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336707547] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:24,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:24,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-07-12 18:30:24,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394310859] [2022-07-12 18:30:24,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:24,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:30:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:30:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:30:24,680 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:24,884 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2022-07-12 18:30:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:30:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 23 [2022-07-12 18:30:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:24,885 INFO L225 Difference]: With dead ends: 70 [2022-07-12 18:30:24,886 INFO L226 Difference]: Without dead ends: 70 [2022-07-12 18:30:24,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:30:24,889 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:24,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 73 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:30:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-12 18:30:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-07-12 18:30:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 63 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) [2022-07-12 18:30:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-07-12 18:30:24,903 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 23 [2022-07-12 18:30:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:24,903 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-07-12 18:30:24,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-07-12 18:30:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:30:24,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:24,905 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:24,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:25,111 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,SelfDestructingSolverStorable3 [2022-07-12 18:30:25,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1707912335, now seen corresponding path program 1 times [2022-07-12 18:30:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:25,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171461854] [2022-07-12 18:30:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:25,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171461854] [2022-07-12 18:30:25,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171461854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031699629] [2022-07-12 18:30:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:25,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:25,293 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) [2022-07-12 18:30:25,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:30:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:30:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:25,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:25,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031699629] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:25,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:25,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-12 18:30:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258449850] [2022-07-12 18:30:25,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:25,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:30:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:30:25,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:30:25,629 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:25,707 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-07-12 18:30:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:30:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 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 47 [2022-07-12 18:30:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:25,708 INFO L225 Difference]: With dead ends: 112 [2022-07-12 18:30:25,709 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 18:30:25,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:30:25,710 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:25,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:30:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 18:30:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-12 18:30:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 111 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-07-12 18:30:25,724 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 47 [2022-07-12 18:30:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:25,724 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-07-12 18:30:25,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-07-12 18:30:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-12 18:30:25,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:25,729 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:25,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:25,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:25,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash -726611221, now seen corresponding path program 2 times [2022-07-12 18:30:25,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:25,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34739404] [2022-07-12 18:30:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:25,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:26,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34739404] [2022-07-12 18:30:26,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34739404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976917618] [2022-07-12 18:30:26,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:30:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:26,342 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) [2022-07-12 18:30:26,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:30:26,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:30:26,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:30:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:26,419 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:30:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-12 18:30:26,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:30:26,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976917618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:26,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:30:26,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2022-07-12 18:30:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711232739] [2022-07-12 18:30:26,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:30:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:30:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:30:26,701 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:26,754 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2022-07-12 18:30:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:30:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-12 18:30:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:26,756 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:30:26,756 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:30:26,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:30:26,757 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:26,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:30:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:30:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-07-12 18:30:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 120 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2022-07-12 18:30:26,763 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 95 [2022-07-12 18:30:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:26,763 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2022-07-12 18:30:26,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:26,764 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2022-07-12 18:30:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-12 18:30:26,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:26,765 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:26,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:26,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:26,988 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1806473229, now seen corresponding path program 1 times [2022-07-12 18:30:26,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063155479] [2022-07-12 18:30:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-12 18:30:27,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:27,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063155479] [2022-07-12 18:30:27,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063155479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:27,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:27,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:30:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457633541] [2022-07-12 18:30:27,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:30:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:30:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:27,128 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:27,133 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-07-12 18:30:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:30:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 97 [2022-07-12 18:30:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:27,135 INFO L225 Difference]: With dead ends: 120 [2022-07-12 18:30:27,135 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 18:30:27,135 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 [2022-07-12 18:30:27,136 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:30:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 18:30:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-12 18:30:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 119 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2022-07-12 18:30:27,144 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 97 [2022-07-12 18:30:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:27,144 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2022-07-12 18:30:27,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2022-07-12 18:30:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-12 18:30:27,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:27,146 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 18:30:27,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash 853988464, now seen corresponding path program 1 times [2022-07-12 18:30:27,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143151871] [2022-07-12 18:30:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-12 18:30:27,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:27,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143151871] [2022-07-12 18:30:27,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143151871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:27,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:27,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:30:27,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140029773] [2022-07-12 18:30:27,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:30:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:27,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:30:27,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:30:27,260 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:27,295 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2022-07-12 18:30:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:30:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 99 [2022-07-12 18:30:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:27,296 INFO L225 Difference]: With dead ends: 125 [2022-07-12 18:30:27,296 INFO L226 Difference]: Without dead ends: 125 [2022-07-12 18:30:27,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:30:27,297 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:27,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:30:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-12 18:30:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-07-12 18:30:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-07-12 18:30:27,302 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 99 [2022-07-12 18:30:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:27,302 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-07-12 18:30:27,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-07-12 18:30:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-12 18:30:27,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:27,304 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:27,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:30:27,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1714714637, now seen corresponding path program 1 times [2022-07-12 18:30:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:27,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163568806] [2022-07-12 18:30:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:27,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:27,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163568806] [2022-07-12 18:30:27,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163568806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463083323] [2022-07-12 18:30:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:27,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:27,600 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) [2022-07-12 18:30:27,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:30:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:30:27,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:28,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463083323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:28,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:28,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-12 18:30:28,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765197244] [2022-07-12 18:30:28,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:28,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 18:30:28,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 18:30:28,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:30:28,559 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:28,726 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2022-07-12 18:30:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 18:30:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-12 18:30:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:28,728 INFO L225 Difference]: With dead ends: 216 [2022-07-12 18:30:28,728 INFO L226 Difference]: Without dead ends: 216 [2022-07-12 18:30:28,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:30:28,729 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:28,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 202 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:30:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-12 18:30:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-12 18:30:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 215 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2022-07-12 18:30:28,734 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 101 [2022-07-12 18:30:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:28,735 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2022-07-12 18:30:28,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2022-07-12 18:30:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-12 18:30:28,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:28,737 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:28,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:28,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:28,960 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1874420395, now seen corresponding path program 2 times [2022-07-12 18:30:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104085621] [2022-07-12 18:30:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:29,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104085621] [2022-07-12 18:30:29,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104085621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306752820] [2022-07-12 18:30:29,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:30:29,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:29,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:29,902 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) [2022-07-12 18:30:29,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:30:29,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:30:29,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:30:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-07-12 18:30:30,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:30:30,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306752820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:30,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:30:30,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [49] total 51 [2022-07-12 18:30:30,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244443928] [2022-07-12 18:30:30,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:30,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:30:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:30:30,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 18:30:30,644 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:30,646 INFO L93 Difference]: Finished difference Result 236 states and 245 transitions. [2022-07-12 18:30:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:30:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 197 [2022-07-12 18:30:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:30,647 INFO L225 Difference]: With dead ends: 236 [2022-07-12 18:30:30,648 INFO L226 Difference]: Without dead ends: 232 [2022-07-12 18:30:30,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 18:30:30,649 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:30,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-12 18:30:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-12 18:30:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2022-07-12 18:30:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 224 states have (on average 1.0580357142857142) internal successors, (237), 227 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) [2022-07-12 18:30:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 237 transitions. [2022-07-12 18:30:30,654 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 237 transitions. Word has length 197 [2022-07-12 18:30:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:30,654 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 237 transitions. [2022-07-12 18:30:30,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 237 transitions. [2022-07-12 18:30:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-12 18:30:30,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:30,657 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:30,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:30,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:30,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1875755066, now seen corresponding path program 1 times [2022-07-12 18:30:30,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:30,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185804130] [2022-07-12 18:30:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:30,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:30:31,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:31,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185804130] [2022-07-12 18:30:31,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185804130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:31,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714815951] [2022-07-12 18:30:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:31,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:31,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:31,865 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) [2022-07-12 18:30:31,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:30:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 18:30:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:30:32,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:30:34,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714815951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:34,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:34,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-12 18:30:34,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337164026] [2022-07-12 18:30:34,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:34,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-12 18:30:34,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-12 18:30:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-12 18:30:34,654 INFO L87 Difference]: Start difference. First operand 228 states and 237 transitions. Second operand has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:35,065 INFO L93 Difference]: Finished difference Result 420 states and 429 transitions. [2022-07-12 18:30:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-12 18:30:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 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 197 [2022-07-12 18:30:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:35,068 INFO L225 Difference]: With dead ends: 420 [2022-07-12 18:30:35,068 INFO L226 Difference]: Without dead ends: 420 [2022-07-12 18:30:35,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-12 18:30:35,070 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 282 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:35,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 184 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:30:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-07-12 18:30:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-07-12 18:30:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 416 states have (on average 1.03125) internal successors, (429), 419 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 429 transitions. [2022-07-12 18:30:35,077 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 429 transitions. Word has length 197 [2022-07-12 18:30:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:35,077 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 429 transitions. [2022-07-12 18:30:35,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 429 transitions. [2022-07-12 18:30:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-07-12 18:30:35,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:35,082 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:35,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 18:30:35,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:35,306 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash -385247830, now seen corresponding path program 2 times [2022-07-12 18:30:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:35,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026212683] [2022-07-12 18:30:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:35,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:30:38,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:38,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026212683] [2022-07-12 18:30:38,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026212683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:38,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664660287] [2022-07-12 18:30:38,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:30:38,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:38,590 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) [2022-07-12 18:30:38,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:30:38,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:30:38,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-12 18:30:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:30:39,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:30:47,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664660287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:47,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:47,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-07-12 18:30:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842453022] [2022-07-12 18:30:47,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:47,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-07-12 18:30:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-07-12 18:30:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-12 18:30:47,868 INFO L87 Difference]: Start difference. First operand 420 states and 429 transitions. Second operand has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:48,890 INFO L93 Difference]: Finished difference Result 804 states and 813 transitions. [2022-07-12 18:30:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-07-12 18:30:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 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 389 [2022-07-12 18:30:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:48,893 INFO L225 Difference]: With dead ends: 804 [2022-07-12 18:30:48,893 INFO L226 Difference]: Without dead ends: 804 [2022-07-12 18:30:48,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-12 18:30:48,897 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 570 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:48,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 280 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:30:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-07-12 18:30:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2022-07-12 18:30:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 800 states have (on average 1.01625) internal successors, (813), 803 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 813 transitions. [2022-07-12 18:30:48,918 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 813 transitions. Word has length 389 [2022-07-12 18:30:48,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:48,918 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 813 transitions. [2022-07-12 18:30:48,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 813 transitions. [2022-07-12 18:30:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2022-07-12 18:30:48,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:48,933 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:48,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:49,147 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,SelfDestructingSolverStorable11 [2022-07-12 18:30:49,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:30:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash 587317386, now seen corresponding path program 3 times [2022-07-12 18:30:49,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:49,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56472321] [2022-07-12 18:30:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:31:00,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:00,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56472321] [2022-07-12 18:31:00,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56472321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:00,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529466197] [2022-07-12 18:31:00,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:31:00,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:00,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:00,840 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) [2022-07-12 18:31:00,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:31:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:31:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:31:01,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:31:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:01,086 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:31:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2022-07-12 18:31:03,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:31:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2022-07-12 18:31:06,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529466197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:31:06,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:31:06,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 7, 7] total 205 [2022-07-12 18:31:06,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022299342] [2022-07-12 18:31:06,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:31:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-07-12 18:31:06,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-07-12 18:31:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18572, Invalid=23248, Unknown=0, NotChecked=0, Total=41820 [2022-07-12 18:31:06,033 INFO L87 Difference]: Start difference. First operand 804 states and 813 transitions. Second operand has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:23,821 INFO L93 Difference]: Finished difference Result 849 states and 864 transitions. [2022-07-12 18:31:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-07-12 18:31:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 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 773 [2022-07-12 18:31:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:23,826 INFO L225 Difference]: With dead ends: 849 [2022-07-12 18:31:23,827 INFO L226 Difference]: Without dead ends: 849 [2022-07-12 18:31:23,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1933 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21435 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=56818, Invalid=103582, Unknown=0, NotChecked=0, Total=160400 [2022-07-12 18:31:23,839 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2961 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:23,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2961 Valid, 346 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 782 Invalid, 0 Unknown, 53 Unchecked, 0.8s Time] [2022-07-12 18:31:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-07-12 18:31:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 833. [2022-07-12 18:31:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 829 states have (on average 1.028950542822678) internal successors, (853), 832 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 853 transitions. [2022-07-12 18:31:23,852 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 853 transitions. Word has length 773 [2022-07-12 18:31:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:23,853 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 853 transitions. [2022-07-12 18:31:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 853 transitions. [2022-07-12 18:31:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-07-12 18:31:23,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:23,871 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:23,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:24,083 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,SelfDestructingSolverStorable12 [2022-07-12 18:31:24,083 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:31:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1343914931, now seen corresponding path program 1 times [2022-07-12 18:31:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:24,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432053930] [2022-07-12 18:31:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:24,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 72775 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 72773 trivial. 0 not checked. [2022-07-12 18:31:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:24,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432053930] [2022-07-12 18:31:24,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432053930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:24,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:24,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:31:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508823269] [2022-07-12 18:31:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:24,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:31:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:31:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:31:24,423 INFO L87 Difference]: Start difference. First operand 833 states and 853 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:24,431 INFO L93 Difference]: Finished difference Result 835 states and 854 transitions. [2022-07-12 18:31:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:31:24,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 779 [2022-07-12 18:31:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:24,434 INFO L225 Difference]: With dead ends: 835 [2022-07-12 18:31:24,435 INFO L226 Difference]: Without dead ends: 834 [2022-07-12 18:31:24,435 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 [2022-07-12 18:31:24,435 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:24,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:31:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-07-12 18:31:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2022-07-12 18:31:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 830 states have (on average 1.0253012048192771) internal successors, (851), 833 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 851 transitions. [2022-07-12 18:31:24,447 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 851 transitions. Word has length 779 [2022-07-12 18:31:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:24,448 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 851 transitions. [2022-07-12 18:31:24,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 851 transitions. [2022-07-12 18:31:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-07-12 18:31:24,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:24,454 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 18:31:24,454 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:31:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1100580240, now seen corresponding path program 1 times [2022-07-12 18:31:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:24,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281354102] [2022-07-12 18:31:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72777 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 72774 trivial. 0 not checked. [2022-07-12 18:31:24,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:24,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281354102] [2022-07-12 18:31:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281354102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:24,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:31:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892195316] [2022-07-12 18:31:24,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:31:24,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:31:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:31:24,829 INFO L87 Difference]: Start difference. First operand 834 states and 851 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:24,843 INFO L93 Difference]: Finished difference Result 841 states and 855 transitions. [2022-07-12 18:31:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:31:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 781 [2022-07-12 18:31:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:24,846 INFO L225 Difference]: With dead ends: 841 [2022-07-12 18:31:24,846 INFO L226 Difference]: Without dead ends: 841 [2022-07-12 18:31:24,848 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 [2022-07-12 18:31:24,849 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:24,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:31:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-07-12 18:31:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 829. [2022-07-12 18:31:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.0181378476420797) internal successors, (842), 828 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 842 transitions. [2022-07-12 18:31:24,860 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 842 transitions. Word has length 781 [2022-07-12 18:31:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:24,861 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 842 transitions. [2022-07-12 18:31:24,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 842 transitions. [2022-07-12 18:31:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2022-07-12 18:31:24,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:24,867 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:24,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 18:31:24,868 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:31:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash 901457319, now seen corresponding path program 1 times [2022-07-12 18:31:24,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:24,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180660449] [2022-07-12 18:31:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:24,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:31:36,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:36,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180660449] [2022-07-12 18:31:36,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180660449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:36,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301933115] [2022-07-12 18:31:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:36,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:36,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:36,424 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) [2022-07-12 18:31:36,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:31:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 193 conjunts are in the unsatisfiable core [2022-07-12 18:31:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:31:37,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:32:10,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301933115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:10,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:10,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 387 [2022-07-12 18:32:10,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513143970] [2022-07-12 18:32:10,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:10,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 387 states [2022-07-12 18:32:10,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 387 interpolants. [2022-07-12 18:32:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74691, Invalid=74691, Unknown=0, NotChecked=0, Total=149382 [2022-07-12 18:32:10,848 INFO L87 Difference]: Start difference. First operand 829 states and 842 transitions. Second operand has 387 states, 387 states have (on average 4.015503875968992) internal successors, (1554), 387 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:15,166 INFO L93 Difference]: Finished difference Result 1601 states and 1614 transitions. [2022-07-12 18:32:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 386 states. [2022-07-12 18:32:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 387 states, 387 states have (on average 4.015503875968992) internal successors, (1554), 387 states have internal predecessors, (1554), 0 states have call successors, (0), 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 787 [2022-07-12 18:32:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:15,173 INFO L225 Difference]: With dead ends: 1601 [2022-07-12 18:32:15,173 INFO L226 Difference]: Without dead ends: 1601 [2022-07-12 18:32:15,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1766 GetRequests, 1381 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=74691, Invalid=74691, Unknown=0, NotChecked=0, Total=149382 [2022-07-12 18:32:15,182 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1728 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:15,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 526 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 18:32:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-07-12 18:32:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2022-07-12 18:32:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1599 states have (on average 1.0093808630393997) internal successors, (1614), 1600 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 1614 transitions. [2022-07-12 18:32:15,202 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 1614 transitions. Word has length 787 [2022-07-12 18:32:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:15,203 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 1614 transitions. [2022-07-12 18:32:15,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 387 states, 387 states have (on average 4.015503875968992) internal successors, (1554), 387 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 1614 transitions. [2022-07-12 18:32:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1560 [2022-07-12 18:32:15,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:15,221 INFO L195 NwaCegarLoop]: trace histogram [384, 384, 384, 384, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:15,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:15,439 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,SelfDestructingSolverStorable15 [2022-07-12 18:32:15,439 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:32:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1517771908, now seen corresponding path program 2 times [2022-07-12 18:32:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:15,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228924896] [2022-07-12 18:32:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:15,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:33:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 294533 backedges. 0 proven. 294528 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:33:00,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:33:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228924896] [2022-07-12 18:33:00,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228924896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:33:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201298242] [2022-07-12 18:33:00,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:33:00,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:33:00,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:33:00,770 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) [2022-07-12 18:33:00,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:33:01,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:33:01,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:33:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:33:01,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:33:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 294533 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 294533 trivial. 0 not checked. [2022-07-12 18:33:05,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:33:05,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201298242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:33:05,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:33:05,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [387] total 389 [2022-07-12 18:33:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122063456] [2022-07-12 18:33:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:33:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:33:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:33:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:33:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74695, Invalid=76237, Unknown=0, NotChecked=0, Total=150932 [2022-07-12 18:33:05,747 INFO L87 Difference]: Start difference. First operand 1601 states and 1614 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2022-07-12 18:33:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:33:05,751 INFO L93 Difference]: Finished difference Result 1600 states and 1613 transitions. [2022-07-12 18:33:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:33:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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 1559 [2022-07-12 18:33:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:33:05,757 INFO L225 Difference]: With dead ends: 1600 [2022-07-12 18:33:05,757 INFO L226 Difference]: Without dead ends: 1595 [2022-07-12 18:33:05,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1945 GetRequests, 1558 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=74695, Invalid=76237, Unknown=0, NotChecked=0, Total=150932 [2022-07-12 18:33:05,767 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:33:05,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-07-12 18:33:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-07-12 18:33:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1574. [2022-07-12 18:33:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 1.003178639542276) internal successors, (1578), 1573 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:33:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 1578 transitions. [2022-07-12 18:33:05,788 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 1578 transitions. Word has length 1559 [2022-07-12 18:33:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:33:05,789 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 1578 transitions. [2022-07-12 18:33:05,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2022-07-12 18:33:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 1578 transitions. [2022-07-12 18:33:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1562 [2022-07-12 18:33:05,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:33:05,806 INFO L195 NwaCegarLoop]: trace histogram [384, 384, 384, 384, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-12 18:33:05,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:33:06,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 18:33:06,032 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-12 18:33:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:33:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash -869508622, now seen corresponding path program 4 times [2022-07-12 18:33:06,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:33:06,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457935320] [2022-07-12 18:33:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:33:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:33:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:33:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 294555 backedges. 0 proven. 294528 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 18:33:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:33:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457935320] [2022-07-12 18:33:51,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457935320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:33:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671697876] [2022-07-12 18:33:51,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:33:51,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:33:51,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:33:51,610 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) [2022-07-12 18:33:51,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process