./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/ldv-memsafety/ArraysOfVariableLength2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:47:34,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:47:34,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:47:34,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:47:34,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:47:34,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:47:34,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:47:34,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:47:34,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:47:34,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:47:34,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:47:34,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:47:34,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:47:34,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:47:34,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:47:34,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:47:34,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:47:34,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:47:34,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:47:34,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:47:34,538 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:47:34,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:47:34,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:47:34,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:47:34,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:47:34,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:47:34,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:47:34,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:47:34,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:47:34,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:47:34,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:47:34,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:47:34,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:47:34,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:47:34,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:47:34,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:47:34,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:47:34,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:47:34,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:47:34,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:47:34,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:47:34,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:47:34,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:47:34,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:47:34,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:47:34,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:47:34,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:47:34,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:47:34,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:47:34,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:47:34,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:47:34,577 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:47:34,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:47:34,578 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:47:34,578 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:47:34,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:47:34,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:47:34,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:47:34,579 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:47:34,579 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:47:34,579 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:47:34,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:47:34,579 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:47:34,579 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:47:34,579 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:47:34,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:47:34,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:47:34,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:47:34,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:47:34,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:47:34,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:47:34,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:47:34,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:47:34,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2022-07-12 18:47:34,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:47:34,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:47:34,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:47:34,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:47:34,820 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:47:34,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2022-07-12 18:47:34,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab01217a4/86f7c796372b4e70ac55619855d80b22/FLAGc2692d3d5 [2022-07-12 18:47:35,330 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:47:35,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2022-07-12 18:47:35,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab01217a4/86f7c796372b4e70ac55619855d80b22/FLAGc2692d3d5 [2022-07-12 18:47:35,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab01217a4/86f7c796372b4e70ac55619855d80b22 [2022-07-12 18:47:35,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:47:35,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:47:35,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:47:35,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:47:35,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:47:35,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0ec7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35, skipping insertion in model container [2022-07-12 18:47:35,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:47:35,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:47:35,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:47:35,591 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:47:35,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:47:35,627 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:47:35,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35 WrapperNode [2022-07-12 18:47:35,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:47:35,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:47:35,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:47:35,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:47:35,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,668 INFO L137 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2022-07-12 18:47:35,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:47:35,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:47:35,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:47:35,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:47:35,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:47:35,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:47:35,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:47:35,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:47:35,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (1/1) ... [2022-07-12 18:47:35,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:47:35,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:35,753 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 18:47:35,795 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 18:47:35,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:47:35,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:47:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:47:35,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:47:35,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:47:35,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:47:35,863 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:47:35,865 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:47:36,081 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:47:36,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:47:36,089 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 18:47:36,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:47:36 BoogieIcfgContainer [2022-07-12 18:47:36,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:47:36,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:47:36,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:47:36,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:47:36,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:47:35" (1/3) ... [2022-07-12 18:47:36,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6837c9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:47:36, skipping insertion in model container [2022-07-12 18:47:36,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:47:35" (2/3) ... [2022-07-12 18:47:36,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6837c9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:47:36, skipping insertion in model container [2022-07-12 18:47:36,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:47:36" (3/3) ... [2022-07-12 18:47:36,097 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2022-07-12 18:47:36,107 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:47:36,107 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-12 18:47:36,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:47:36,151 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@60177b0e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d4693f9 [2022-07-12 18:47:36,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-12 18:47:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 18:47:36,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:36,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 18:47:36,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2022-07-12 18:47:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:36,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137775896] [2022-07-12 18:47:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:36,319 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 18:47:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137775896] [2022-07-12 18:47:36,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137775896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:36,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:36,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:47:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058847941] [2022-07-12 18:47:36,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:36,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:47:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:47:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:47:36,347 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:36,423 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-07-12 18:47:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:47:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-12 18:47:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:36,432 INFO L225 Difference]: With dead ends: 69 [2022-07-12 18:47:36,432 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 18:47:36,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:36,436 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:36,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 18:47:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2022-07-12 18:47:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-07-12 18:47:36,464 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2022-07-12 18:47:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:36,464 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-07-12 18:47:36,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-07-12 18:47:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:47:36,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:36,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:36,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:47:36,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:36,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:36,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2022-07-12 18:47:36,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:36,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063413663] [2022-07-12 18:47:36,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:36,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:36,537 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 18:47:36,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:36,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063413663] [2022-07-12 18:47:36,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063413663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:36,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:36,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:47:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850018146] [2022-07-12 18:47:36,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:47:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:47:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:36,540 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:36,634 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-07-12 18:47:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:47:36,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:47:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:36,636 INFO L225 Difference]: With dead ends: 70 [2022-07-12 18:47:36,636 INFO L226 Difference]: Without dead ends: 70 [2022-07-12 18:47:36,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:47:36,638 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:36,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:47:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-12 18:47:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2022-07-12 18:47:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 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 18:47:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-07-12 18:47:36,643 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2022-07-12 18:47:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:36,643 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-07-12 18:47:36,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-07-12 18:47:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:47:36,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:36,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:36,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:47:36,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2022-07-12 18:47:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:36,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300502565] [2022-07-12 18:47:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:36,683 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 18:47:36,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:36,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300502565] [2022-07-12 18:47:36,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300502565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:36,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:36,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:47:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362703720] [2022-07-12 18:47:36,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:36,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:47:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:47:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:36,686 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 18:47:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:36,727 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-07-12 18:47:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:47:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:47:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:36,728 INFO L225 Difference]: With dead ends: 75 [2022-07-12 18:47:36,728 INFO L226 Difference]: Without dead ends: 75 [2022-07-12 18:47:36,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:47:36,729 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:36,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 152 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-12 18:47:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-07-12 18:47:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-12 18:47:36,737 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2022-07-12 18:47:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:36,738 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-12 18:47:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 18:47:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-12 18:47:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:47:36,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:36,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:36,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:47:36,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2022-07-12 18:47:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:36,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639012104] [2022-07-12 18:47:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:36,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:36,824 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 18:47:36,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:36,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639012104] [2022-07-12 18:47:36,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639012104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:36,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:36,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:47:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246548172] [2022-07-12 18:47:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:47:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:47:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:47:36,828 INFO L87 Difference]: Start difference. First operand 45 states and 50 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 18:47:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:36,863 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-07-12 18:47:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:47:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:47:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:36,866 INFO L225 Difference]: With dead ends: 43 [2022-07-12 18:47:36,866 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 18:47:36,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:47:36,868 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:36,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 18:47:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-12 18:47:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-07-12 18:47:36,872 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2022-07-12 18:47:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:36,872 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-07-12 18:47:36,872 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 18:47:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-07-12 18:47:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:47:36,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:36,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:36,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:47:36,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2022-07-12 18:47:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:36,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020761112] [2022-07-12 18:47:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:36,958 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 18:47:36,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020761112] [2022-07-12 18:47:36,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020761112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:36,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:36,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:47:36,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187639753] [2022-07-12 18:47:36,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:47:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:47:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:36,960 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 18:47:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:37,009 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-07-12 18:47:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:47:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:47:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:37,010 INFO L225 Difference]: With dead ends: 50 [2022-07-12 18:47:37,010 INFO L226 Difference]: Without dead ends: 50 [2022-07-12 18:47:37,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:47:37,012 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:37,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-12 18:47:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-12 18:47:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-12 18:47:37,015 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2022-07-12 18:47:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:37,015 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-12 18:47:37,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 18:47:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-12 18:47:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:47:37,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:37,016 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:47:37,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2022-07-12 18:47:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:37,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566064271] [2022-07-12 18:47:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:37,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:37,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566064271] [2022-07-12 18:47:37,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566064271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:37,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:37,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:47:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415321538] [2022-07-12 18:47:37,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:37,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:47:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:47:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:47:37,066 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:37,097 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-07-12 18:47:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:47:37,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-12 18:47:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:37,098 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:47:37,099 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 18:47:37,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:37,100 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:37,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 18:47:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-12 18:47:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-07-12 18:47:37,108 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2022-07-12 18:47:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:37,108 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-07-12 18:47:37,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-07-12 18:47:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:47:37,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:37,109 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:37,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:47:37,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2022-07-12 18:47:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665596225] [2022-07-12 18:47:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:37,210 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 18:47:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665596225] [2022-07-12 18:47:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665596225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552265865] [2022-07-12 18:47:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:37,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:37,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:37,213 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 18:47:37,214 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 18:47:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:37,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:47:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:37,343 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 18:47:37,375 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:47:37,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 18:47:37,482 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 18:47:37,528 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:47:37,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:47:37,586 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:47:37,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 18:47:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:37,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:42,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:47:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:46,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552265865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:46,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:46,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 15 [2022-07-12 18:47:46,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749885781] [2022-07-12 18:47:46,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:46,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:47:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:47:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=177, Unknown=5, NotChecked=0, Total=240 [2022-07-12 18:47:46,720 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 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 18:47:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:47,247 INFO L93 Difference]: Finished difference Result 188 states and 225 transitions. [2022-07-12 18:47:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:47:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-12 18:47:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:47,250 INFO L225 Difference]: With dead ends: 188 [2022-07-12 18:47:47,250 INFO L226 Difference]: Without dead ends: 188 [2022-07-12 18:47:47,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=228, Invalid=637, Unknown=5, NotChecked=0, Total=870 [2022-07-12 18:47:47,251 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 389 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:47,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 146 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 150 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2022-07-12 18:47:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-12 18:47:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2022-07-12 18:47:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 105 states have (on average 1.4285714285714286) internal successors, (150), 112 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2022-07-12 18:47:47,257 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 16 [2022-07-12 18:47:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:47,257 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2022-07-12 18:47:47,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 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 18:47:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2022-07-12 18:47:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:47:47,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:47,258 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:47,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:47:47,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:47,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2022-07-12 18:47:47,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:47,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900780830] [2022-07-12 18:47:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:47,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:47,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900780830] [2022-07-12 18:47:47,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900780830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:47,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:47,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:47:47,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320814436] [2022-07-12 18:47:47,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:47,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:47:47,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:47:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:47:47,506 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 18:47:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:47,518 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2022-07-12 18:47:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:47:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 17 [2022-07-12 18:47:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:47,519 INFO L225 Difference]: With dead ends: 112 [2022-07-12 18:47:47,519 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 18:47:47,519 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 18:47:47,520 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:47,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 18:47:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-12 18:47:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 105 states have (on average 1.4) internal successors, (147), 111 states have internal predecessors, (147), 0 states have call successors, (0), 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 18:47:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2022-07-12 18:47:47,526 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 17 [2022-07-12 18:47:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:47,528 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2022-07-12 18:47:47,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 18:47:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2022-07-12 18:47:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:47:47,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:47,529 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:47,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:47:47,530 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:47,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:47,530 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2022-07-12 18:47:47,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:47,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193012344] [2022-07-12 18:47:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:47,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:47,575 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 18:47:47,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193012344] [2022-07-12 18:47:47,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193012344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468834722] [2022-07-12 18:47:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:47,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:47,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:47,578 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 18:47:47,579 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 18:47:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:47:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:47,667 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 18:47:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:47,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:47,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468834722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:47,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:47,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-07-12 18:47:47,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189793563] [2022-07-12 18:47:47,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:47,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:47:47,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:47:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:47:47,708 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 18:47:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:47,773 INFO L93 Difference]: Finished difference Result 159 states and 208 transitions. [2022-07-12 18:47:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:47:47,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 17 [2022-07-12 18:47:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:47,775 INFO L225 Difference]: With dead ends: 159 [2022-07-12 18:47:47,775 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 18:47:47,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:47:47,775 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:47,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 69 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 18:47:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 117. [2022-07-12 18:47:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.4) internal successors, (154), 116 states have internal predecessors, (154), 0 states have call successors, (0), 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 18:47:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 154 transitions. [2022-07-12 18:47:47,780 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 154 transitions. Word has length 17 [2022-07-12 18:47:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:47,780 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 154 transitions. [2022-07-12 18:47:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 18:47:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 154 transitions. [2022-07-12 18:47:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:47:47,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:47,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:47,798 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 18:47:47,988 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,SelfDestructingSolverStorable8 [2022-07-12 18:47:47,989 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2022-07-12 18:47:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021058359] [2022-07-12 18:47:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:48,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021058359] [2022-07-12 18:47:48,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021058359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:48,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:48,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:47:48,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585501341] [2022-07-12 18:47:48,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:48,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:47:48,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:47:48,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:47:48,028 INFO L87 Difference]: Start difference. First operand 117 states and 154 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 18:47:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:48,046 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2022-07-12 18:47:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:47:48,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 18 [2022-07-12 18:47:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:48,047 INFO L225 Difference]: With dead ends: 116 [2022-07-12 18:47:48,047 INFO L226 Difference]: Without dead ends: 116 [2022-07-12 18:47:48,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:48,048 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:48,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-12 18:47:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-07-12 18:47:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 115 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2022-07-12 18:47:48,066 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 18 [2022-07-12 18:47:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:48,066 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2022-07-12 18:47:48,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 18:47:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2022-07-12 18:47:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:47:48,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:48,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:48,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:47:48,072 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:48,072 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2022-07-12 18:47:48,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:48,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243730867] [2022-07-12 18:47:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:48,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:48,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243730867] [2022-07-12 18:47:48,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243730867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:48,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184589735] [2022-07-12 18:47:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:48,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:48,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:48,120 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 18:47:48,121 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 18:47:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:48,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:47:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184589735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:48,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:48,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-12 18:47:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149324602] [2022-07-12 18:47:48,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:47:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:47:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:47:48,207 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:48,259 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2022-07-12 18:47:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:47:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-12 18:47:48,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:48,260 INFO L225 Difference]: With dead ends: 111 [2022-07-12 18:47:48,260 INFO L226 Difference]: Without dead ends: 111 [2022-07-12 18:47:48,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:47:48,261 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:48,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-12 18:47:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2022-07-12 18:47:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.3265306122448979) internal successors, (130), 103 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-07-12 18:47:48,267 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 18 [2022-07-12 18:47:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:48,268 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-07-12 18:47:48,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-07-12 18:47:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:47:48,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:48,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:48,287 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 18:47:48,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:48,473 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash 624099572, now seen corresponding path program 1 times [2022-07-12 18:47:48,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:48,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629711236] [2022-07-12 18:47:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:48,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629711236] [2022-07-12 18:47:48,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629711236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629484900] [2022-07-12 18:47:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:48,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:48,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:48,505 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 18:47:48,506 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 18:47:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:48,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:47:48,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629484900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:48,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:48,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-12 18:47:48,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110719718] [2022-07-12 18:47:48,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:48,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:47:48,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:48,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:47:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:47:48,579 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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 18:47:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:48,603 INFO L93 Difference]: Finished difference Result 168 states and 201 transitions. [2022-07-12 18:47:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:47:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-12 18:47:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:48,604 INFO L225 Difference]: With dead ends: 168 [2022-07-12 18:47:48,604 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 18:47:48,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:47:48,605 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 172 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:48,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 112 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 18:47:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2022-07-12 18:47:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3051948051948052) internal successors, (201), 159 states have internal predecessors, (201), 0 states have call successors, (0), 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 18:47:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2022-07-12 18:47:48,609 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 20 [2022-07-12 18:47:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:48,609 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2022-07-12 18:47:48,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 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 18:47:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2022-07-12 18:47:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:47:48,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:48,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:48,630 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 18:47:48,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:48,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2022-07-12 18:47:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011813430] [2022-07-12 18:47:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011813430] [2022-07-12 18:47:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011813430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:48,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417339396] [2022-07-12 18:47:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:48,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:48,890 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 18:47:48,891 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 18:47:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:47:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:48,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:49,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417339396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:49,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:49,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-12 18:47:49,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265200068] [2022-07-12 18:47:49,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:49,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:47:49,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:49,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:47:49,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:47:49,006 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:49,093 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-07-12 18:47:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:47:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 18:47:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:49,094 INFO L225 Difference]: With dead ends: 160 [2022-07-12 18:47:49,094 INFO L226 Difference]: Without dead ends: 160 [2022-07-12 18:47:49,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:47:49,095 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 169 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:49,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 116 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:47:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-12 18:47:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2022-07-12 18:47:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.2894736842105263) internal successors, (196), 157 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 18:47:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 196 transitions. [2022-07-12 18:47:49,098 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 196 transitions. Word has length 21 [2022-07-12 18:47:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:49,099 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 196 transitions. [2022-07-12 18:47:49,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 196 transitions. [2022-07-12 18:47:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:47:49,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:49,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:49,116 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 18:47:49,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 18:47:49,313 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:49,313 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2022-07-12 18:47:49,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:49,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642493662] [2022-07-12 18:47:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:49,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642493662] [2022-07-12 18:47:49,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642493662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466804075] [2022-07-12 18:47:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:49,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:49,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:49,372 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 18:47:49,396 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 18:47:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:47:49,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:49,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:49,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-12 18:47:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:49,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466804075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:49,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:49,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-12 18:47:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212643968] [2022-07-12 18:47:49,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:49,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:47:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:47:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:47:49,530 INFO L87 Difference]: Start difference. First operand 158 states and 196 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:47:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:49,650 INFO L93 Difference]: Finished difference Result 220 states and 264 transitions. [2022-07-12 18:47:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:47:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:47:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:49,651 INFO L225 Difference]: With dead ends: 220 [2022-07-12 18:47:49,651 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 18:47:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:47:49,652 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:49,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:47:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 18:47:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2022-07-12 18:47:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 162 states have internal predecessors, (201), 0 states have call successors, (0), 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 18:47:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2022-07-12 18:47:49,654 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 23 [2022-07-12 18:47:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:49,655 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2022-07-12 18:47:49,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:47:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2022-07-12 18:47:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:47:49,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:49,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:49,675 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 18:47:49,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:49,868 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2022-07-12 18:47:49,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:49,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257761873] [2022-07-12 18:47:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:49,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:49,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257761873] [2022-07-12 18:47:49,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257761873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:49,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185689137] [2022-07-12 18:47:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:49,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:49,905 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 18:47:49,906 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 18:47:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:49,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:47:49,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:49,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:50,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185689137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:50,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:50,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-07-12 18:47:50,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672566373] [2022-07-12 18:47:50,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:50,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:47:50,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:50,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:47:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:47:50,018 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:50,093 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2022-07-12 18:47:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:47:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 18:47:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:50,094 INFO L225 Difference]: With dead ends: 158 [2022-07-12 18:47:50,094 INFO L226 Difference]: Without dead ends: 158 [2022-07-12 18:47:50,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:47:50,095 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:50,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 105 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-12 18:47:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2022-07-12 18:47:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 147 states have internal predecessors, (181), 0 states have call successors, (0), 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 18:47:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 181 transitions. [2022-07-12 18:47:50,099 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 181 transitions. Word has length 27 [2022-07-12 18:47:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:50,099 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 181 transitions. [2022-07-12 18:47:50,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 18:47:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 181 transitions. [2022-07-12 18:47:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:47:50,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:50,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:50,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:47:50,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:50,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2022-07-12 18:47:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716926009] [2022-07-12 18:47:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:50,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716926009] [2022-07-12 18:47:50,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716926009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:50,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417760815] [2022-07-12 18:47:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:50,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:50,369 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 18:47:50,370 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 18:47:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:47:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:50,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:50,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417760815] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:50,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:50,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-12 18:47:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842487232] [2022-07-12 18:47:50,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:47:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:47:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:47:50,498 INFO L87 Difference]: Start difference. First operand 148 states and 181 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:50,625 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-07-12 18:47:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:47:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 18:47:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:50,626 INFO L225 Difference]: With dead ends: 150 [2022-07-12 18:47:50,626 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 18:47:50,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:47:50,627 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 163 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:50,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 156 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:47:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 18:47:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-07-12 18:47:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 146 states have internal predecessors, (178), 0 states have call successors, (0), 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 18:47:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-07-12 18:47:50,630 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 27 [2022-07-12 18:47:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:50,630 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-07-12 18:47:50,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-07-12 18:47:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:47:50,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:50,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:50,649 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 18:47:50,831 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,SelfDestructingSolverStorable15 [2022-07-12 18:47:50,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2022-07-12 18:47:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980563486] [2022-07-12 18:47:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:47:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980563486] [2022-07-12 18:47:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980563486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566991814] [2022-07-12 18:47:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:50,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:50,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:50,943 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 18:47:50,957 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 18:47:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:51,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:47:51,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:51,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:47:51,156 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-12 18:47:51,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-12 18:47:51,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:47:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:51,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:57,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-12 18:47:57,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-12 18:47:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:57,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566991814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:57,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:57,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 31 [2022-07-12 18:47:57,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423312190] [2022-07-12 18:47:57,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:57,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 18:47:57,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 18:47:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=834, Unknown=2, NotChecked=0, Total=930 [2022-07-12 18:47:57,951 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 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 18:47:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:58,585 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2022-07-12 18:47:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:47:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 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 31 [2022-07-12 18:47:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:58,586 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:47:58,586 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:47:58,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=344, Invalid=2204, Unknown=2, NotChecked=0, Total=2550 [2022-07-12 18:47:58,587 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:58,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 333 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 503 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-07-12 18:47:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:47:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-07-12 18:47:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 123 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2022-07-12 18:47:58,591 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 31 [2022-07-12 18:47:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:58,591 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2022-07-12 18:47:58,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 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 18:47:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2022-07-12 18:47:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:47:58,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:58,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:58,611 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 18:47:58,792 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,SelfDestructingSolverStorable16 [2022-07-12 18:47:58,792 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:58,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2032716941, now seen corresponding path program 1 times [2022-07-12 18:47:58,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:58,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223376403] [2022-07-12 18:47:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:58,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:58,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:58,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223376403] [2022-07-12 18:47:58,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223376403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:58,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858041699] [2022-07-12 18:47:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:58,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:58,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:58,913 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 18:47:58,916 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 18:47:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 18:47:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:59,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:59,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-12 18:47:59,099 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:47:59,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:47:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:47:59,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:59,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-12 18:47:59,277 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:47:59,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 73 [2022-07-12 18:47:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:47:59,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858041699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:59,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:59,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-07-12 18:47:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612236119] [2022-07-12 18:47:59,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:47:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:47:59,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:47:59,389 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 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 18:47:59,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:59,688 INFO L93 Difference]: Finished difference Result 208 states and 248 transitions. [2022-07-12 18:47:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:47:59,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 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 41 [2022-07-12 18:47:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:59,689 INFO L225 Difference]: With dead ends: 208 [2022-07-12 18:47:59,689 INFO L226 Difference]: Without dead ends: 208 [2022-07-12 18:47:59,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:47:59,690 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 188 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:59,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 194 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 229 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-07-12 18:47:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-12 18:47:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 99. [2022-07-12 18:47:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 98 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2022-07-12 18:47:59,692 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 41 [2022-07-12 18:47:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:59,692 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2022-07-12 18:47:59,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 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 18:47:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2022-07-12 18:47:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:47:59,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:59,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:59,713 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 18:47:59,913 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,SelfDestructingSolverStorable17 [2022-07-12 18:47:59,914 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:47:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2022-07-12 18:47:59,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:59,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927443497] [2022-07-12 18:47:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:47:59,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:59,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927443497] [2022-07-12 18:47:59,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927443497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:59,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33797857] [2022-07-12 18:47:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:59,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:59,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:59,972 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 18:47:59,973 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 18:48:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:00,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:48:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:00,080 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 18:48:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:48:00,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:48:00,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33797857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:00,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:00,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-12 18:48:00,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292465394] [2022-07-12 18:48:00,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:00,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:48:00,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:48:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:48:00,192 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 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 18:48:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:00,318 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2022-07-12 18:48:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:48:00,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-12 18:48:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:00,319 INFO L225 Difference]: With dead ends: 126 [2022-07-12 18:48:00,319 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 18:48:00,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:48:00,319 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:00,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 169 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 18:48:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2022-07-12 18:48:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.1875) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2022-07-12 18:48:00,321 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 42 [2022-07-12 18:48:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:00,321 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2022-07-12 18:48:00,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 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 18:48:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2022-07-12 18:48:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:48:00,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:00,322 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:00,340 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 18:48:00,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:00,523 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:48:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 2 times [2022-07-12 18:48:00,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:00,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584324606] [2022-07-12 18:48:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:00,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:48:00,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:00,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584324606] [2022-07-12 18:48:00,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584324606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482930766] [2022-07-12 18:48:00,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:00,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:00,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:00,603 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 18:48:00,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:48:00,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:48:00,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:48:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:48:00,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:48:00,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482930766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:00,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:00,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-12 18:48:00,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128821933] [2022-07-12 18:48:00,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:00,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:48:00,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:48:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:48:00,822 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 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 18:48:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:01,000 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-07-12 18:48:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:48:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-12 18:48:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:01,001 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:48:01,001 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:48:01,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:48:01,001 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 222 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:01,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 169 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:48:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2022-07-12 18:48:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 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 18:48:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-07-12 18:48:01,003 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 46 [2022-07-12 18:48:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:01,004 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-07-12 18:48:01,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 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 18:48:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-07-12 18:48:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:48:01,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:01,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-07-12 18:48:01,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:01,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:01,214 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:48:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:01,214 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2022-07-12 18:48:01,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:01,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072409872] [2022-07-12 18:48:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:01,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:48:01,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:01,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072409872] [2022-07-12 18:48:01,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072409872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:01,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521631192] [2022-07-12 18:48:01,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:01,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:01,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:01,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:48:01,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:48:01,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:48:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:48:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:48:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:48:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521631192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:01,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:01,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-12 18:48:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473987878] [2022-07-12 18:48:01,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:01,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:48:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:48:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:48:01,437 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:01,542 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2022-07-12 18:48:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:48:01,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-12 18:48:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:01,543 INFO L225 Difference]: With dead ends: 101 [2022-07-12 18:48:01,543 INFO L226 Difference]: Without dead ends: 101 [2022-07-12 18:48:01,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:48:01,544 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 66 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:01,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 188 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-12 18:48:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-07-12 18:48:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 98 states have internal predecessors, (107), 0 states have call successors, (0), 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 18:48:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2022-07-12 18:48:01,550 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 47 [2022-07-12 18:48:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:01,550 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2022-07-12 18:48:01,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2022-07-12 18:48:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:48:01,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:01,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-07-12 18:48:01,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:01,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 18:48:01,760 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:48:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2022-07-12 18:48:01,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:01,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751517580] [2022-07-12 18:48:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:48:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:01,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751517580] [2022-07-12 18:48:01,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751517580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:01,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508271183] [2022-07-12 18:48:01,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:48:01,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:01,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:01,896 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:48:01,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:48:01,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:48:01,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:48:01,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:01,984 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 18:48:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 18:48:02,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 18:48:02,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508271183] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:02,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:02,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 17 [2022-07-12 18:48:02,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550194083] [2022-07-12 18:48:02,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:02,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:48:02,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:48:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:48:02,294 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 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 18:48:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:02,842 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2022-07-12 18:48:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:48:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 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 52 [2022-07-12 18:48:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:02,846 INFO L225 Difference]: With dead ends: 128 [2022-07-12 18:48:02,846 INFO L226 Difference]: Without dead ends: 128 [2022-07-12 18:48:02,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:48:02,847 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 199 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:02,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 188 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:48:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-12 18:48:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-07-12 18:48:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 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 18:48:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-07-12 18:48:02,849 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 52 [2022-07-12 18:48:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:02,849 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-07-12 18:48:02,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 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 18:48:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-07-12 18:48:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:48:02,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:02,849 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-12 18:48:02,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 18:48:03,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:03,050 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:48:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2022-07-12 18:48:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996398146] [2022-07-12 18:48:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:03,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:48:03,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:03,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996398146] [2022-07-12 18:48:03,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996398146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:03,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297279841] [2022-07-12 18:48:03,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:03,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:03,102 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:48:03,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:48:03,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:48:03,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:48:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:48:03,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:48:03,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297279841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:03,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:03,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-12 18:48:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822227293] [2022-07-12 18:48:03,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:03,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:48:03,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:48:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:48:03,320 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:03,436 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-07-12 18:48:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:48:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-12 18:48:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:03,436 INFO L225 Difference]: With dead ends: 110 [2022-07-12 18:48:03,437 INFO L226 Difference]: Without dead ends: 110 [2022-07-12 18:48:03,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:48:03,438 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 91 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:03,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 253 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-12 18:48:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2022-07-12 18:48:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.11) internal successors, (111), 103 states have internal predecessors, (111), 0 states have call successors, (0), 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 18:48:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2022-07-12 18:48:03,443 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 56 [2022-07-12 18:48:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:03,443 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2022-07-12 18:48:03,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2022-07-12 18:48:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 18:48:03,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:03,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-12 18:48:03,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:03,660 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:48:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2022-07-12 18:48:03,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:03,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867307584] [2022-07-12 18:48:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:03,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:48:03,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:03,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867307584] [2022-07-12 18:48:03,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867307584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:03,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518072085] [2022-07-12 18:48:03,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:48:03,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:03,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:48:03,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:48:03,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 18:48:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:03,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:48:03,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:03,989 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 18:48:03,992 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 18:48:04,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:48:04,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:48:04,016 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:48:04,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:48:04,085 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:48:04,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 18:48:04,172 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 18:48:04,282 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-12 18:48:04,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:48:04,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:48:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 18:48:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:14,705 WARN L233 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:48:24,792 WARN L233 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:48:24,850 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:48:24,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 93 [2022-07-12 18:48:41,241 WARN L233 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:48:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 18:48:41,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518072085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:41,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:41,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2022-07-12 18:48:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494230397] [2022-07-12 18:48:41,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:41,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:48:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:48:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=794, Unknown=4, NotChecked=0, Total=992 [2022-07-12 18:48:41,516 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 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 18:49:48,252 WARN L233 SmtUtils]: Spent 42.03s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:49:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:48,425 INFO L93 Difference]: Finished difference Result 166 states and 183 transitions. [2022-07-12 18:49:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:49:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-12 18:49:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:48,426 INFO L225 Difference]: With dead ends: 166 [2022-07-12 18:49:48,426 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 18:49:48,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 103.4s TimeCoverageRelationStatistics Valid=501, Invalid=1841, Unknown=10, NotChecked=0, Total=2352 [2022-07-12 18:49:48,427 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:48,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 338 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 228 Invalid, 0 Unknown, 254 Unchecked, 0.1s Time] [2022-07-12 18:49:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 18:49:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2022-07-12 18:49:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 162 states have internal predecessors, (181), 0 states have call successors, (0), 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 18:49:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 181 transitions. [2022-07-12 18:49:48,431 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 181 transitions. Word has length 60 [2022-07-12 18:49:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:48,431 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 181 transitions. [2022-07-12 18:49:48,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 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 18:49:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 181 transitions. [2022-07-12 18:49:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:49:48,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:48,432 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-07-12 18:49:48,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:48,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-12 18:49:48,649 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:49:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 1 times [2022-07-12 18:49:48,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:48,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734134285] [2022-07-12 18:49:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:48,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 18:49:48,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:48,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734134285] [2022-07-12 18:49:48,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734134285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:48,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553925449] [2022-07-12 18:49:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:48,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:48,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:48,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:49:48,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:49:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:48,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:49:48,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:49,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-12 18:49:49,092 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:49,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:49:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:49,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:49,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-12 18:49:49,302 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:49:49,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 73 [2022-07-12 18:49:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:49,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553925449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:49,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:49,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-07-12 18:49:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048894464] [2022-07-12 18:49:49,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:49,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:49:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:49:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:49:49,505 INFO L87 Difference]: Start difference. First operand 163 states and 181 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 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 18:49:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:49,960 INFO L93 Difference]: Finished difference Result 244 states and 276 transitions. [2022-07-12 18:49:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:49:49,962 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 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 75 [2022-07-12 18:49:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:49,962 INFO L225 Difference]: With dead ends: 244 [2022-07-12 18:49:49,963 INFO L226 Difference]: Without dead ends: 244 [2022-07-12 18:49:49,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1109, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:49:49,964 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 250 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:49,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 472 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 492 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-07-12 18:49:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-12 18:49:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2022-07-12 18:49:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 174 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 18:49:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2022-07-12 18:49:49,966 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 75 [2022-07-12 18:49:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:49,967 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2022-07-12 18:49:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 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 18:49:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2022-07-12 18:49:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:49:49,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:49,968 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-07-12 18:49:49,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:50,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:50,180 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:49:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash 683173057, now seen corresponding path program 1 times [2022-07-12 18:49:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:50,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232345780] [2022-07-12 18:49:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:50,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 88 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:50,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:50,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232345780] [2022-07-12 18:49:50,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232345780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:50,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165228607] [2022-07-12 18:49:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:50,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:50,304 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:49:50,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:49:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:49:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:50,459 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 18:49:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:50,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:50,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165228607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:50,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-07-12 18:49:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23715949] [2022-07-12 18:49:50,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:50,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:49:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:49:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:49:50,649 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 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 18:49:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:50,868 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2022-07-12 18:49:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:49:50,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-12 18:49:50,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:50,872 INFO L225 Difference]: With dead ends: 223 [2022-07-12 18:49:50,872 INFO L226 Difference]: Without dead ends: 223 [2022-07-12 18:49:50,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:49:50,873 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 91 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:50,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 294 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:49:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-12 18:49:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2022-07-12 18:49:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 177 states have internal predecessors, (199), 0 states have call successors, (0), 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 18:49:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2022-07-12 18:49:50,876 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 76 [2022-07-12 18:49:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:50,876 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2022-07-12 18:49:50,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 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 18:49:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2022-07-12 18:49:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 18:49:50,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:50,876 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-07-12 18:49:50,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-12 18:49:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:51,082 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:49:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2022-07-12 18:49:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:51,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457653569] [2022-07-12 18:49:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:51,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457653569] [2022-07-12 18:49:51,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457653569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892266710] [2022-07-12 18:49:51,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:49:51,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:51,170 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:49:51,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:49:51,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:49:51,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:49:51,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:51,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:49:51,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892266710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:51,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:51,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-12 18:49:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247167439] [2022-07-12 18:49:51,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:51,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:49:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:49:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:49:51,461 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:49:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:51,763 INFO L93 Difference]: Finished difference Result 220 states and 242 transitions. [2022-07-12 18:49:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:49:51,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-12 18:49:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:51,764 INFO L225 Difference]: With dead ends: 220 [2022-07-12 18:49:51,764 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 18:49:51,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:49:51,764 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 284 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:51,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 277 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:49:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 18:49:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 176. [2022-07-12 18:49:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.127906976744186) internal successors, (194), 175 states have internal predecessors, (194), 0 states have call successors, (0), 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 18:49:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2022-07-12 18:49:51,767 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 80 [2022-07-12 18:49:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:51,767 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2022-07-12 18:49:51,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:49:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2022-07-12 18:49:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 18:49:51,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:51,768 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2022-07-12 18:49:51,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:51,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:51,975 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:49:51,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:51,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2063647327, now seen corresponding path program 4 times [2022-07-12 18:49:51,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:51,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067831909] [2022-07-12 18:49:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:51,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 18:49:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:52,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067831909] [2022-07-12 18:49:52,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067831909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:52,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499049587] [2022-07-12 18:49:52,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:49:52,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:52,070 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:49:52,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:49:52,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:49:52,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:49:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 81 proven. 87 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 18:49:52,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 81 proven. 87 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 18:49:52,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499049587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:52,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:52,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2022-07-12 18:49:52,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579572550] [2022-07-12 18:49:52,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:52,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:49:52,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:49:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:49:52,407 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 17 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 18:49:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:52,669 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2022-07-12 18:49:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:49:52,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 17 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) Word has length 89 [2022-07-12 18:49:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:52,670 INFO L225 Difference]: With dead ends: 197 [2022-07-12 18:49:52,670 INFO L226 Difference]: Without dead ends: 197 [2022-07-12 18:49:52,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:49:52,671 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 105 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:52,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 247 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:49:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-12 18:49:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2022-07-12 18:49:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.1032608695652173) internal successors, (203), 187 states have internal predecessors, (203), 0 states have call successors, (0), 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 18:49:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2022-07-12 18:49:52,673 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 89 [2022-07-12 18:49:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:52,673 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2022-07-12 18:49:52,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 17 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 18:49:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2022-07-12 18:49:52,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-12 18:49:52,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:52,674 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2022-07-12 18:49:52,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:52,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 18:49:52,879 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:49:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:52,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1513850931, now seen corresponding path program 5 times [2022-07-12 18:49:52,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:52,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051750249] [2022-07-12 18:49:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:52,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 18:49:53,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:53,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051750249] [2022-07-12 18:49:53,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051750249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:53,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144777485] [2022-07-12 18:49:53,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:49:53,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:53,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:53,216 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:49:53,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:49:53,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 18:49:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 134 conjunts are in the unsatisfiable core [2022-07-12 18:49:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:53,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:49:53,571 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:53,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:49:53,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-12 18:49:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:53,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-12 18:49:53,962 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:53,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:49:54,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-12 18:49:54,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-12 18:49:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:54,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-12 18:49:54,410 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:54,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:49:54,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:49:54,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 46 [2022-07-12 18:49:54,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:54,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:49:54,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:54,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 69 [2022-07-12 18:49:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:55,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:55,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:55,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-07-12 18:49:55,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 25 [2022-07-12 18:49:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 6 proven. 229 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:49:55,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:57,640 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:49:57,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 18:49:59,657 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_64| Int) (v_ArrVal_841 Int) (v_ArrVal_836 Int)) (let ((.cse3 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)) v_ArrVal_836))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse3)) (.cse2 (select .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset|))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_64|) 0 .cse2))) (or (< v_ArrVal_841 (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_64| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (< 0 (+ v_ArrVal_841 (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_64| (store .cse1 4 v_ArrVal_841)) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 8)) .cse2)) (= |v_ULTIMATE.start_foo_~#a~0#1.base_64| |c_ULTIMATE.start_main_~#b~0#1.base|) (not (<= |c_ULTIMATE.start_main_#t~ret6#1| v_ArrVal_836))))))) is different from false