./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:50:35,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:50:35,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:50:36,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:50:36,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:50:36,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:50:36,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:50:36,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:50:36,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:50:36,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:50:36,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:50:36,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:50:36,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:50:36,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:50:36,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:50:36,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:50:36,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:50:36,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:50:36,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:50:36,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:50:36,051 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:50:36,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:50:36,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:50:36,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:50:36,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:50:36,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:50:36,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:50:36,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:50:36,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:50:36,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:50:36,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:50:36,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:50:36,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:50:36,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:50:36,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:50:36,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:50:36,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:50:36,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:50:36,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:50:36,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:50:36,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:50:36,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:50:36,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:50:36,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:50:36,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:50:36,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:50:36,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:50:36,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:50:36,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:50:36,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:50:36,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:50:36,104 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:50:36,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:50:36,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:50:36,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:50:36,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:50:36,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:50:36,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:50:36,112 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:50:36,113 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:50:36,113 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:50:36,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:50:36,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:50:36,115 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:50:36,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:50:36,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:50:36,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:50:36,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:50:36,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:50:36,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:50:36,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:50:36,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:50:36,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:50:36,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2022-07-21 16:50:36,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:50:36,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:50:36,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:50:36,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:50:36,458 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:50:36,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-07-21 16:50:36,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dcf82130/5e5207a056f246a587205fa620225c8d/FLAGaafcb48c0 [2022-07-21 16:50:36,872 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:50:36,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-07-21 16:50:36,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dcf82130/5e5207a056f246a587205fa620225c8d/FLAGaafcb48c0 [2022-07-21 16:50:37,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dcf82130/5e5207a056f246a587205fa620225c8d [2022-07-21 16:50:37,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:50:37,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:50:37,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:50:37,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:50:37,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:50:37,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79aa1e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37, skipping insertion in model container [2022-07-21 16:50:37,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:50:37,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:50:37,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:50:37,487 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:50:37,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:50:37,548 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:50:37,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37 WrapperNode [2022-07-21 16:50:37,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:50:37,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:50:37,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:50:37,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:50:37,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,592 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-07-21 16:50:37,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:50:37,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:50:37,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:50:37,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:50:37,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:50:37,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:50:37,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:50:37,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:50:37,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (1/1) ... [2022-07-21 16:50:37,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:50:37,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:37,655 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) [2022-07-21 16:50:37,662 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 [2022-07-21 16:50:37,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:50:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:50:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:50:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:50:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:50:37,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:50:37,745 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:50:37,746 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:50:37,913 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:50:37,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:50:37,917 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 16:50:37,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:50:37 BoogieIcfgContainer [2022-07-21 16:50:37,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:50:37,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:50:37,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:50:37,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:50:37,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:50:37" (1/3) ... [2022-07-21 16:50:37,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8f388a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:50:37, skipping insertion in model container [2022-07-21 16:50:37,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:37" (2/3) ... [2022-07-21 16:50:37,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8f388a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:50:37, skipping insertion in model container [2022-07-21 16:50:37,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:50:37" (3/3) ... [2022-07-21 16:50:37,923 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2022-07-21 16:50:37,939 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:50:37,946 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-21 16:50:38,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:50:38,005 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@4af8c78a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69c69cda [2022-07-21 16:50:38,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-21 16:50:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:50:38,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:38,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:50:38,022 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)] === [2022-07-21 16:50:38,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-21 16:50:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963705055] [2022-07-21 16:50:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:38,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:38,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963705055] [2022-07-21 16:50:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963705055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:38,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:38,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:38,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943246736] [2022-07-21 16:50:38,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:38,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:38,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:38,207 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:38,252 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-07-21 16:50:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 16:50:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:38,260 INFO L225 Difference]: With dead ends: 60 [2022-07-21 16:50:38,260 INFO L226 Difference]: Without dead ends: 56 [2022-07-21 16:50:38,262 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 [2022-07-21 16:50:38,265 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:38,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 91 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-21 16:50:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-07-21 16:50:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-21 16:50:38,292 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-07-21 16:50:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:38,293 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-21 16:50:38,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-21 16:50:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:50:38,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:38,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:50:38,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:50:38,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-07-21 16:50:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:38,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839110090] [2022-07-21 16:50:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:38,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839110090] [2022-07-21 16:50:38,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839110090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:38,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:38,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:50:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105282331] [2022-07-21 16:50:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:38,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:38,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:38,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:38,365 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:38,391 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-21 16:50:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 16:50:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:38,393 INFO L225 Difference]: With dead ends: 32 [2022-07-21 16:50:38,393 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 16:50:38,396 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 [2022-07-21 16:50:38,397 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:38,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 16:50:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-21 16:50:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 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) [2022-07-21 16:50:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-21 16:50:38,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-21 16:50:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:38,406 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-21 16:50:38,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-21 16:50:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:50:38,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:38,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:50:38,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:50:38,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-07-21 16:50:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:38,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805246502] [2022-07-21 16:50:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:38,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:38,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805246502] [2022-07-21 16:50:38,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805246502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:38,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:38,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613831094] [2022-07-21 16:50:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:38,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:38,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:38,483 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:38,514 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-07-21 16:50:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 16:50:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:38,515 INFO L225 Difference]: With dead ends: 31 [2022-07-21 16:50:38,515 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 16:50:38,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:38,516 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:38,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 16:50:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 16:50:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-21 16:50:38,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 6 [2022-07-21 16:50:38,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:38,520 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-21 16:50:38,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-21 16:50:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:50:38,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:38,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:50:38,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:50:38,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-21 16:50:38,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:38,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535842976] [2022-07-21 16:50:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:38,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:38,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535842976] [2022-07-21 16:50:38,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535842976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:38,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:38,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:38,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630168081] [2022-07-21 16:50:38,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:38,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:38,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:38,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:38,591 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:38,649 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-07-21 16:50:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:38,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 16:50:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:38,651 INFO L225 Difference]: With dead ends: 55 [2022-07-21 16:50:38,652 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 16:50:38,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:38,659 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:38,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 16:50:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-07-21 16:50:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-07-21 16:50:38,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2022-07-21 16:50:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:38,666 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-07-21 16:50:38,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-07-21 16:50:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:50:38,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:38,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:38,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:50:38,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-07-21 16:50:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:38,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868682172] [2022-07-21 16:50:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:38,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:38,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868682172] [2022-07-21 16:50:38,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868682172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:38,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:38,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:38,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432671527] [2022-07-21 16:50:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:38,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:38,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:38,704 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:38,739 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-21 16:50:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:38,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:50:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:38,740 INFO L225 Difference]: With dead ends: 30 [2022-07-21 16:50:38,740 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 16:50:38,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:38,741 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:38,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 16:50:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 16:50:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-07-21 16:50:38,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 8 [2022-07-21 16:50:38,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:38,747 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-07-21 16:50:38,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-07-21 16:50:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:50:38,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:38,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:38,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:50:38,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:38,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-07-21 16:50:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:38,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779040512] [2022-07-21 16:50:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:38,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:38,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779040512] [2022-07-21 16:50:38,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779040512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:38,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:38,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:38,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676643021] [2022-07-21 16:50:38,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:38,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:38,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:38,819 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:38,880 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-07-21 16:50:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:50:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:38,882 INFO L225 Difference]: With dead ends: 42 [2022-07-21 16:50:38,882 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 16:50:38,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:38,883 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:38,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 34 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 16:50:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-07-21 16:50:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 36 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) [2022-07-21 16:50:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-07-21 16:50:38,886 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 8 [2022-07-21 16:50:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:38,886 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-07-21 16:50:38,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-07-21 16:50:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:50:38,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:38,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:38,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:50:38,888 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)] === [2022-07-21 16:50:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-21 16:50:38,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:38,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513821808] [2022-07-21 16:50:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:38,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:38,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513821808] [2022-07-21 16:50:38,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513821808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849153864] [2022-07-21 16:50:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:38,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:38,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:39,007 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) [2022-07-21 16:50:39,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:50:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:39,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:50:39,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:39,102 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 [2022-07-21 16:50:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:39,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:39,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849153864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:39,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:39,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-21 16:50:39,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947439278] [2022-07-21 16:50:39,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:39,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:50:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:50:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:50:39,267 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:39,412 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2022-07-21 16:50:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:50:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:50:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:39,414 INFO L225 Difference]: With dead ends: 87 [2022-07-21 16:50:39,414 INFO L226 Difference]: Without dead ends: 87 [2022-07-21 16:50:39,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:50:39,414 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 212 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:39,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 125 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-21 16:50:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 34. [2022-07-21 16:50:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-07-21 16:50:39,417 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2022-07-21 16:50:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:39,417 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-07-21 16:50:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-07-21 16:50:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:50:39,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:39,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:39,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 16:50:39,635 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 [2022-07-21 16:50:39,636 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash -204603407, now seen corresponding path program 1 times [2022-07-21 16:50:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:39,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011206726] [2022-07-21 16:50:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:39,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:39,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011206726] [2022-07-21 16:50:39,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011206726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:39,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:39,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:39,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786836092] [2022-07-21 16:50:39,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:39,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:39,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:39,656 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:39,661 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-07-21 16:50:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 16:50:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:39,662 INFO L225 Difference]: With dead ends: 36 [2022-07-21 16:50:39,662 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 16:50:39,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:39,663 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:39,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 16:50:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-21 16:50:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.3125) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-21 16:50:39,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 12 [2022-07-21 16:50:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:39,665 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-21 16:50:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-21 16:50:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:50:39,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:39,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:39,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:50:39,666 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:39,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:39,667 INFO L85 PathProgramCache]: Analyzing trace with hash 938762030, now seen corresponding path program 1 times [2022-07-21 16:50:39,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:39,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892931794] [2022-07-21 16:50:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:39,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:39,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892931794] [2022-07-21 16:50:39,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892931794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:39,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:39,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 16:50:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310692922] [2022-07-21 16:50:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:50:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:50:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:50:39,741 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:39,819 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-07-21 16:50:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:50:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-21 16:50:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:39,820 INFO L225 Difference]: With dead ends: 48 [2022-07-21 16:50:39,821 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 16:50:39,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:50:39,821 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:39,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 128 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 16:50:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-07-21 16:50:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-21 16:50:39,824 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2022-07-21 16:50:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:39,824 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-21 16:50:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-21 16:50:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:50:39,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:39,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:39,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 16:50:39,825 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1196927468, now seen corresponding path program 1 times [2022-07-21 16:50:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:39,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429117526] [2022-07-21 16:50:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:39,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:39,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429117526] [2022-07-21 16:50:39,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429117526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:39,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:39,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 16:50:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099900002] [2022-07-21 16:50:39,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:39,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:50:39,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:50:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:39,907 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:40,045 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-07-21 16:50:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:50:40,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-21 16:50:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:40,046 INFO L225 Difference]: With dead ends: 57 [2022-07-21 16:50:40,046 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 16:50:40,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:50:40,046 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:40,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 16:50:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2022-07-21 16:50:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 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) [2022-07-21 16:50:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-21 16:50:40,049 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 14 [2022-07-21 16:50:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:40,049 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-21 16:50:40,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-21 16:50:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:50:40,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:40,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:40,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 16:50:40,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1506335819, now seen corresponding path program 1 times [2022-07-21 16:50:40,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:40,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839214143] [2022-07-21 16:50:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:40,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:40,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839214143] [2022-07-21 16:50:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839214143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:40,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:40,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947097656] [2022-07-21 16:50:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:40,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:40,083 INFO L87 Difference]: Start difference. First operand 42 states and 49 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) [2022-07-21 16:50:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:40,093 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-21 16:50:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:40,094 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 [2022-07-21 16:50:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:40,101 INFO L225 Difference]: With dead ends: 41 [2022-07-21 16:50:40,101 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 16:50:40,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:40,102 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:40,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 16:50:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-21 16:50:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-21 16:50:40,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2022-07-21 16:50:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:40,104 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-21 16:50:40,104 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) [2022-07-21 16:50:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-21 16:50:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:50:40,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:40,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:40,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:50:40,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash 676448303, now seen corresponding path program 1 times [2022-07-21 16:50:40,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:40,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008292727] [2022-07-21 16:50:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:40,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:40,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008292727] [2022-07-21 16:50:40,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008292727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:40,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738483249] [2022-07-21 16:50:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:40,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:40,208 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) [2022-07-21 16:50:40,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:50:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:40,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 16:50:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:40,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:40,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:50:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738483249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:40,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:40,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-21 16:50:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678210786] [2022-07-21 16:50:40,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:40,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:50:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:50:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:50:40,439 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:40,555 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-21 16:50:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:50:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2022-07-21 16:50:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:40,556 INFO L225 Difference]: With dead ends: 37 [2022-07-21 16:50:40,556 INFO L226 Difference]: Without dead ends: 33 [2022-07-21 16:50:40,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-07-21 16:50:40,557 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:40,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 61 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-21 16:50:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2022-07-21 16:50:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-07-21 16:50:40,559 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-07-21 16:50:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:40,560 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-07-21 16:50:40,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-07-21 16:50:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 16:50:40,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:40,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:40,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:40,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 16:50:40,778 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1434576067, now seen corresponding path program 2 times [2022-07-21 16:50:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:40,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236019010] [2022-07-21 16:50:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:40,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:40,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236019010] [2022-07-21 16:50:40,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236019010] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720105934] [2022-07-21 16:50:40,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:50:40,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:40,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:40,971 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) [2022-07-21 16:50:40,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:50:41,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:50:41,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:41,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 16:50:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:41,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:50:41,254 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:41,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-21 16:50:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:41,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:41,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:50:41,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:50:41,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:50:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:41,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720105934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:41,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:41,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-07-21 16:50:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534612290] [2022-07-21 16:50:41,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 16:50:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 16:50:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:50:41,659 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:42,018 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-07-21 16:50:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:50:42,018 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-21 16:50:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:42,018 INFO L225 Difference]: With dead ends: 54 [2022-07-21 16:50:42,019 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 16:50:42,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:50:42,020 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:42,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 167 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-07-21 16:50:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 16:50:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-07-21 16:50:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2022-07-21 16:50:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-07-21 16:50:42,021 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2022-07-21 16:50:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:42,022 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-07-21 16:50:42,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-07-21 16:50:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 16:50:42,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:42,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:42,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:42,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:42,223 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)] === [2022-07-21 16:50:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1404730010, now seen corresponding path program 3 times [2022-07-21 16:50:42,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:42,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343717270] [2022-07-21 16:50:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:42,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343717270] [2022-07-21 16:50:42,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343717270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763756671] [2022-07-21 16:50:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:50:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:42,356 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) [2022-07-21 16:50:42,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:50:42,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 16:50:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 16:50:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:42,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:50:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:42,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:50:42,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:50:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:42,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763756671] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:42,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:42,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-21 16:50:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944134695] [2022-07-21 16:50:42,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:42,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:50:42,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:50:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:50:42,742 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:42,964 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-07-21 16:50:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:50:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 16:50:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:42,966 INFO L225 Difference]: With dead ends: 59 [2022-07-21 16:50:42,966 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 16:50:42,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:50:42,966 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:42,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 159 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 234 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-07-21 16:50:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 16:50:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-07-21 16:50:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-07-21 16:50:42,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-07-21 16:50:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:42,968 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-07-21 16:50:42,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-07-21 16:50:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 16:50:42,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:42,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:42,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 16:50:43,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:43,170 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 746707293, now seen corresponding path program 4 times [2022-07-21 16:50:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672278912] [2022-07-21 16:50:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:43,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:43,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672278912] [2022-07-21 16:50:43,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672278912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:43,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013949755] [2022-07-21 16:50:43,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:50:43,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:43,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:43,287 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) [2022-07-21 16:50:43,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:50:43,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:50:43,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 16:50:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:43,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:43,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:50:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:43,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013949755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:43,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:43,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2022-07-21 16:50:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149446187] [2022-07-21 16:50:43,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:43,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 16:50:43,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 16:50:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:50:43,625 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,852 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-07-21 16:50:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:50:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 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 38 [2022-07-21 16:50:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,853 INFO L225 Difference]: With dead ends: 50 [2022-07-21 16:50:43,853 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:50:43,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:50:43,854 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 271 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:43,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 143 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:50:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-07-21 16:50:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2022-07-21 16:50:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-21 16:50:43,856 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2022-07-21 16:50:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,856 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-21 16:50:43,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-21 16:50:43,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 16:50:43,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,857 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:44,067 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,SelfDestructingSolverStorable14 [2022-07-21 16:50:44,068 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)] === [2022-07-21 16:50:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1090509681, now seen corresponding path program 5 times [2022-07-21 16:50:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388691703] [2022-07-21 16:50:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388691703] [2022-07-21 16:50:44,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388691703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:44,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483935193] [2022-07-21 16:50:44,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:50:44,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:44,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:44,270 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) [2022-07-21 16:50:44,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:50:44,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 16:50:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 16:50:44,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:44,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:50:44,524 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 [2022-07-21 16:50:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:44,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:50:44,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:50:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483935193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:44,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:44,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-07-21 16:50:44,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444860194] [2022-07-21 16:50:44,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 16:50:44,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 16:50:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:50:44,682 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,992 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-07-21 16:50:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:50:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-21 16:50:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,993 INFO L225 Difference]: With dead ends: 75 [2022-07-21 16:50:44,993 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 16:50:44,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 16:50:44,994 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 160 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 247 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 16:50:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-07-21 16:50:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2022-07-21 16:50:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-07-21 16:50:45,012 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-07-21 16:50:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:45,013 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-07-21 16:50:45,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-07-21 16:50:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:50:45,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:45,019 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:45,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 16:50:45,220 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1893589620, now seen corresponding path program 6 times [2022-07-21 16:50:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:45,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608049777] [2022-07-21 16:50:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:45,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:45,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608049777] [2022-07-21 16:50:45,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608049777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:45,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466777155] [2022-07-21 16:50:45,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:50:45,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:45,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:45,336 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) [2022-07-21 16:50:45,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:50:45,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:50:45,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:45,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 16:50:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:45,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:45,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:50:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:46,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466777155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:46,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:46,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-07-21 16:50:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216516989] [2022-07-21 16:50:46,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:50:46,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:50:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:50:46,194 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 35 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 35 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,602 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-07-21 16:50:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:50:46,603 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 35 states have internal predecessors, (138), 0 states have call successors, (0), 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 48 [2022-07-21 16:50:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,603 INFO L225 Difference]: With dead ends: 60 [2022-07-21 16:50:46,603 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 16:50:46,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=383, Invalid=1597, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:50:46,604 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 364 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 166 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:50:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 16:50:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-07-21 16:50:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-07-21 16:50:46,606 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2022-07-21 16:50:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,606 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-07-21 16:50:46,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.0588235294117645) internal successors, (138), 35 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-07-21 16:50:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 16:50:46,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,607 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 16:50:46,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:46,807 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1457490104, now seen corresponding path program 7 times [2022-07-21 16:50:46,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357881029] [2022-07-21 16:50:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:47,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357881029] [2022-07-21 16:50:47,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357881029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686929530] [2022-07-21 16:50:47,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:50:47,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:47,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:47,070 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) [2022-07-21 16:50:47,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:50:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 16:50:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:47,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:50:47,605 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 [2022-07-21 16:50:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:47,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:47,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:50:47,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:50:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:48,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686929530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:48,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:48,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2022-07-21 16:50:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393190785] [2022-07-21 16:50:48,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:48,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 16:50:48,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 16:50:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:50:48,055 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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) [2022-07-21 16:50:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:48,563 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-07-21 16:50:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:50:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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 54 [2022-07-21 16:50:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:48,564 INFO L225 Difference]: With dead ends: 91 [2022-07-21 16:50:48,564 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 16:50:48,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=2486, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 16:50:48,565 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:48,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 439 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 690 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2022-07-21 16:50:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 16:50:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-07-21 16:50:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-07-21 16:50:48,567 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-07-21 16:50:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:48,567 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-07-21 16:50:48,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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) [2022-07-21 16:50:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-07-21 16:50:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 16:50:48,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:48,568 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:48,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:48,768 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,SelfDestructingSolverStorable17 [2022-07-21 16:50:48,769 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash 454022795, now seen corresponding path program 8 times [2022-07-21 16:50:48,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:48,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883314257] [2022-07-21 16:50:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:48,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:48,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883314257] [2022-07-21 16:50:48,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883314257] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745064466] [2022-07-21 16:50:48,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:50:48,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:48,972 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) [2022-07-21 16:50:48,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:50:49,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:50:49,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 16:50:49,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:49,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:49,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:50:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:49,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745064466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:49,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:49,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-07-21 16:50:49,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51401008] [2022-07-21 16:50:49,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:49,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 16:50:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:49,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 16:50:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-07-21 16:50:49,472 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 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) [2022-07-21 16:50:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:49,750 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-07-21 16:50:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:50:49,751 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 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 58 [2022-07-21 16:50:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:49,751 INFO L225 Difference]: With dead ends: 70 [2022-07-21 16:50:49,751 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 16:50:49,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:50:49,752 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 211 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:49,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 264 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:50:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 16:50:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-07-21 16:50:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-07-21 16:50:49,754 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2022-07-21 16:50:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:49,754 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-07-21 16:50:49,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 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) [2022-07-21 16:50:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-07-21 16:50:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 16:50:49,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:49,755 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:49,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:49,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:49,963 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1538965023, now seen corresponding path program 9 times [2022-07-21 16:50:49,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427023001] [2022-07-21 16:50:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:50,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427023001] [2022-07-21 16:50:50,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427023001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:50,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470174329] [2022-07-21 16:50:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:50:50,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:50,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:50,192 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) [2022-07-21 16:50:50,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:50:50,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 16:50:50,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 16:50:50,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:50,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:50:50,532 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 [2022-07-21 16:50:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:50,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:50:50,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:50:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470174329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:50,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:50,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-07-21 16:50:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155591863] [2022-07-21 16:50:50,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:50,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 16:50:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:50,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 16:50:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 16:50:50,763 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) [2022-07-21 16:50:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:51,288 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2022-07-21 16:50:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:50:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) Word has length 64 [2022-07-21 16:50:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:51,289 INFO L225 Difference]: With dead ends: 107 [2022-07-21 16:50:51,289 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 16:50:51,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 16:50:51,290 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 200 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:51,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 471 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 730 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-07-21 16:50:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 16:50:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-07-21 16:50:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-21 16:50:51,293 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-07-21 16:50:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:51,293 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-21 16:50:51,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) [2022-07-21 16:50:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-21 16:50:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 16:50:51,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:51,294 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:51,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:51,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:51,530 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)] === [2022-07-21 16:50:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1159341474, now seen corresponding path program 10 times [2022-07-21 16:50:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:51,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563798580] [2022-07-21 16:50:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:51,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:51,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:51,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563798580] [2022-07-21 16:50:51,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563798580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:51,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188080211] [2022-07-21 16:50:51,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:50:51,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:51,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:51,762 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) [2022-07-21 16:50:51,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:50:51,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:50:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:51,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 16:50:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:52,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:52,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:50:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:52,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188080211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:52,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:52,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2022-07-21 16:50:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134915664] [2022-07-21 16:50:52,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:52,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 16:50:52,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 16:50:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 16:50:52,354 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:52,695 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-07-21 16:50:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:50:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 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 68 [2022-07-21 16:50:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:52,696 INFO L225 Difference]: With dead ends: 80 [2022-07-21 16:50:52,696 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 16:50:52,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:50:52,697 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 312 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:52,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 337 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:50:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 16:50:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-07-21 16:50:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 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) [2022-07-21 16:50:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-07-21 16:50:52,699 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2022-07-21 16:50:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:52,699 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-07-21 16:50:52,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-07-21 16:50:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 16:50:52,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:52,699 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:52,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:52,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 16:50:52,915 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)] === [2022-07-21 16:50:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash 591208438, now seen corresponding path program 11 times [2022-07-21 16:50:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:52,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121686469] [2022-07-21 16:50:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:52,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:53,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121686469] [2022-07-21 16:50:53,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121686469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872461753] [2022-07-21 16:50:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:50:53,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:53,192 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) [2022-07-21 16:50:53,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:50:53,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 16:50:53,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:53,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 16:50:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:53,297 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 [2022-07-21 16:50:53,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:50:54,193 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:54,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-21 16:50:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:54,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:55,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:50:55,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:50:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 66 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:55,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872461753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:55,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:55,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2022-07-21 16:50:55,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74419773] [2022-07-21 16:50:55,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 16:50:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 16:50:55,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3156, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 16:50:55,645 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:56,698 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2022-07-21 16:50:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:50:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-21 16:50:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:56,699 INFO L225 Difference]: With dead ends: 134 [2022-07-21 16:50:56,699 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 16:50:56,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=616, Invalid=6026, Unknown=0, NotChecked=0, Total=6642 [2022-07-21 16:50:56,702 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 190 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:56,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1008 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 860 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2022-07-21 16:50:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 16:50:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2022-07-21 16:50:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-21 16:50:56,704 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 74 [2022-07-21 16:50:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:56,704 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-21 16:50:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-21 16:50:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 16:50:56,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:56,705 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:56,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:56,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 16:50:56,905 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2078674125, now seen corresponding path program 12 times [2022-07-21 16:50:56,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:56,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598953750] [2022-07-21 16:50:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:56,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:57,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598953750] [2022-07-21 16:50:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598953750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104530312] [2022-07-21 16:50:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:50:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:57,228 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) [2022-07-21 16:50:57,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 16:50:57,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-21 16:50:57,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 16:50:57,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:57,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:50:57,698 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 [2022-07-21 16:50:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:57,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:57,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:50:57,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:50:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:57,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104530312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:57,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:57,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-07-21 16:50:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44762135] [2022-07-21 16:50:57,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 16:50:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 16:50:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:50:57,962 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:58,642 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2022-07-21 16:50:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 16:50:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 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 84 [2022-07-21 16:50:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:58,643 INFO L225 Difference]: With dead ends: 139 [2022-07-21 16:50:58,643 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 16:50:58,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=2991, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 16:50:58,644 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 226 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:58,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 718 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:50:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 16:50:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-07-21 16:50:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-21 16:50:58,646 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-07-21 16:50:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:58,647 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-21 16:50:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-21 16:50:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 16:50:58,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:58,648 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:58,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:58,866 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,SelfDestructingSolverStorable22 [2022-07-21 16:50:58,866 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:50:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash -53373744, now seen corresponding path program 13 times [2022-07-21 16:50:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386769404] [2022-07-21 16:50:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:58,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:59,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:59,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386769404] [2022-07-21 16:50:59,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386769404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:59,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010775329] [2022-07-21 16:50:59,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:50:59,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:59,139 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) [2022-07-21 16:50:59,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 16:50:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 16:50:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:59,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:50:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:59,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010775329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:59,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:59,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2022-07-21 16:50:59,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118703079] [2022-07-21 16:50:59,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:59,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 16:50:59,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 16:50:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:50:59,869 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 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) [2022-07-21 16:51:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:00,200 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-07-21 16:51:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:51:00,200 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 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) Word has length 88 [2022-07-21 16:51:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:00,201 INFO L225 Difference]: With dead ends: 100 [2022-07-21 16:51:00,201 INFO L226 Difference]: Without dead ends: 100 [2022-07-21 16:51:00,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=558, Invalid=2412, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 16:51:00,202 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 389 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:00,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 511 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:51:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-21 16:51:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-07-21 16:51:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-07-21 16:51:00,213 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2022-07-21 16:51:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:00,216 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-07-21 16:51:00,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 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) [2022-07-21 16:51:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-07-21 16:51:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-21 16:51:00,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:00,217 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:00,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:00,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:00,435 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1254356132, now seen corresponding path program 14 times [2022-07-21 16:51:00,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:00,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986472351] [2022-07-21 16:51:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:00,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:00,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986472351] [2022-07-21 16:51:00,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986472351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:00,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806573941] [2022-07-21 16:51:00,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:00,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:00,724 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) [2022-07-21 16:51:00,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 16:51:00,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:00,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:00,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 16:51:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:00,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:01,703 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:01,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-21 16:51:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:01,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:02,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:02,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:51:02,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:02,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806573941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:02,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:02,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2022-07-21 16:51:02,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003778058] [2022-07-21 16:51:02,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:02,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-21 16:51:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-21 16:51:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3728, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 16:51:02,791 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:03,716 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2022-07-21 16:51:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 16:51:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-21 16:51:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:03,717 INFO L225 Difference]: With dead ends: 166 [2022-07-21 16:51:03,717 INFO L226 Difference]: Without dead ends: 113 [2022-07-21 16:51:03,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=534, Invalid=6108, Unknown=0, NotChecked=0, Total=6642 [2022-07-21 16:51:03,718 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 261 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:03,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 974 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 883 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2022-07-21 16:51:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-21 16:51:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-07-21 16:51:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 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) [2022-07-21 16:51:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-07-21 16:51:03,721 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2022-07-21 16:51:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:03,721 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-07-21 16:51:03,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-07-21 16:51:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 16:51:03,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:03,722 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:03,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:03,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:03,940 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1800059013, now seen corresponding path program 15 times [2022-07-21 16:51:03,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:03,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954580899] [2022-07-21 16:51:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:04,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954580899] [2022-07-21 16:51:04,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954580899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582931477] [2022-07-21 16:51:04,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:04,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:04,336 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) [2022-07-21 16:51:04,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 16:51:04,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-21 16:51:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:04,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 16:51:04,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:04,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:04,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:51:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:05,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:05,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582931477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:05,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:05,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-07-21 16:51:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081500128] [2022-07-21 16:51:05,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 16:51:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 16:51:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1859, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:51:05,305 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:06,428 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2022-07-21 16:51:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:51:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 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 104 [2022-07-21 16:51:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:06,429 INFO L225 Difference]: With dead ends: 171 [2022-07-21 16:51:06,429 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 16:51:06,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 181 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 16:51:06,430 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 276 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:06,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1131 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1790 Invalid, 0 Unknown, 48 Unchecked, 0.6s Time] [2022-07-21 16:51:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 16:51:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-07-21 16:51:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-07-21 16:51:06,432 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-07-21 16:51:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:06,432 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-07-21 16:51:06,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-07-21 16:51:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-21 16:51:06,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:06,432 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:06,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:06,639 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,SelfDestructingSolverStorable25 [2022-07-21 16:51:06,640 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash -631787522, now seen corresponding path program 16 times [2022-07-21 16:51:06,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:06,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653808863] [2022-07-21 16:51:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:06,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653808863] [2022-07-21 16:51:06,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653808863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217021420] [2022-07-21 16:51:06,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:51:06,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:06,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:06,970 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) [2022-07-21 16:51:06,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 16:51:07,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:51:07,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:07,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 16:51:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:07,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:07,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:51:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:08,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217021420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:08,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:08,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 50 [2022-07-21 16:51:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633952702] [2022-07-21 16:51:08,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:08,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 16:51:08,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 16:51:08,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 16:51:08,025 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 51 states, 50 states have (on average 4.42) internal successors, (221), 51 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:08,939 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-07-21 16:51:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 16:51:08,940 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.42) internal successors, (221), 51 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-21 16:51:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:08,940 INFO L225 Difference]: With dead ends: 120 [2022-07-21 16:51:08,941 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 16:51:08,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=968, Invalid=4288, Unknown=0, NotChecked=0, Total=5256 [2022-07-21 16:51:08,941 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 649 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:08,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 758 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:51:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 16:51:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-07-21 16:51:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-07-21 16:51:08,943 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2022-07-21 16:51:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:08,944 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-07-21 16:51:08,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.42) internal successors, (221), 51 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-07-21 16:51:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-21 16:51:08,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:08,944 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:08,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 16:51:09,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 16:51:09,145 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash 896038226, now seen corresponding path program 17 times [2022-07-21 16:51:09,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:09,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371095117] [2022-07-21 16:51:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:09,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:09,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371095117] [2022-07-21 16:51:09,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371095117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960884408] [2022-07-21 16:51:09,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:51:09,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:09,513 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) [2022-07-21 16:51:09,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 16:51:09,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-21 16:51:09,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:09,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 16:51:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:09,703 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 [2022-07-21 16:51:10,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:11,148 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:11,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-21 16:51:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:11,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:12,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:12,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 190 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:13,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960884408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:13,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:13,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2022-07-21 16:51:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515278608] [2022-07-21 16:51:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:13,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-21 16:51:13,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-21 16:51:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=6685, Unknown=0, NotChecked=0, Total=7140 [2022-07-21 16:51:13,440 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 85 states, 85 states have (on average 3.9529411764705884) internal successors, (336), 85 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:19,808 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2022-07-21 16:51:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 16:51:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.9529411764705884) internal successors, (336), 85 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-21 16:51:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:19,809 INFO L225 Difference]: With dead ends: 193 [2022-07-21 16:51:19,809 INFO L226 Difference]: Without dead ends: 128 [2022-07-21 16:51:19,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 218 SyntacticMatches, 26 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3449 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1288, Invalid=15481, Unknown=1, NotChecked=0, Total=16770 [2022-07-21 16:51:19,811 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 268 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:19,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1581 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1266 Invalid, 0 Unknown, 275 Unchecked, 0.4s Time] [2022-07-21 16:51:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-21 16:51:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-07-21 16:51:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-07-21 16:51:19,813 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 114 [2022-07-21 16:51:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:19,813 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-07-21 16:51:19,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.9529411764705884) internal successors, (336), 85 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-07-21 16:51:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 16:51:19,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:19,813 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:19,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:20,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 16:51:20,014 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1772360151, now seen corresponding path program 18 times [2022-07-21 16:51:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643890882] [2022-07-21 16:51:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:20,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:20,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:20,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643890882] [2022-07-21 16:51:20,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643890882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:20,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166263295] [2022-07-21 16:51:20,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:51:20,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:20,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:20,522 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) [2022-07-21 16:51:20,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 16:51:20,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-21 16:51:20,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-21 16:51:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:21,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:21,234 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 [2022-07-21 16:51:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:21,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:21,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:21,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:21,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166263295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:21,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:21,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-07-21 16:51:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038052078] [2022-07-21 16:51:21,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 16:51:21,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 16:51:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 16:51:21,682 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:23,158 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2022-07-21 16:51:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 16:51:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-07-21 16:51:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:23,159 INFO L225 Difference]: With dead ends: 203 [2022-07-21 16:51:23,159 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 16:51:23,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2022-07-21 16:51:23,160 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 269 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:23,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1628 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2585 Invalid, 0 Unknown, 58 Unchecked, 0.8s Time] [2022-07-21 16:51:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 16:51:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-07-21 16:51:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 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) [2022-07-21 16:51:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-07-21 16:51:23,162 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-07-21 16:51:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:23,162 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-07-21 16:51:23,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-07-21 16:51:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 16:51:23,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:23,162 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:23,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-21 16:51:23,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 16:51:23,379 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1291843372, now seen corresponding path program 19 times [2022-07-21 16:51:23,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:23,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239467445] [2022-07-21 16:51:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:23,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:23,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239467445] [2022-07-21 16:51:23,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239467445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444947296] [2022-07-21 16:51:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:51:23,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:23,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:23,880 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) [2022-07-21 16:51:23,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 16:51:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 16:51:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:24,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:25,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:51:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:25,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444947296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:25,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:25,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2022-07-21 16:51:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297936753] [2022-07-21 16:51:25,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-21 16:51:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:25,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-21 16:51:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=3105, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 16:51:25,067 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:25,931 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-07-21 16:51:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:51:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 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 128 [2022-07-21 16:51:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:25,933 INFO L225 Difference]: With dead ends: 140 [2022-07-21 16:51:25,933 INFO L226 Difference]: Without dead ends: 140 [2022-07-21 16:51:25,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1020, Invalid=4530, Unknown=0, NotChecked=0, Total=5550 [2022-07-21 16:51:25,935 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 460 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:25,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 984 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:51:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-21 16:51:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-07-21 16:51:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-07-21 16:51:25,937 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2022-07-21 16:51:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:25,937 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-07-21 16:51:25,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-07-21 16:51:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-21 16:51:25,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:25,937 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:25,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:26,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:26,151 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1709056512, now seen corresponding path program 20 times [2022-07-21 16:51:26,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481930504] [2022-07-21 16:51:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:26,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481930504] [2022-07-21 16:51:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481930504] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122708657] [2022-07-21 16:51:26,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:26,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:26,728 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) [2022-07-21 16:51:26,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 16:51:26,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:26,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 16:51:26,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:27,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:28,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:28,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-21 16:51:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:28,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:29,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:29,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:51:29,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:29,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122708657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:29,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:29,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 84 [2022-07-21 16:51:29,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163000759] [2022-07-21 16:51:29,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:29,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-21 16:51:29,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-21 16:51:29,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2022-07-21 16:51:29,826 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:31,198 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2022-07-21 16:51:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 16:51:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-21 16:51:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:31,199 INFO L225 Difference]: With dead ends: 230 [2022-07-21 16:51:31,200 INFO L226 Difference]: Without dead ends: 153 [2022-07-21 16:51:31,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=822, Invalid=10308, Unknown=0, NotChecked=0, Total=11130 [2022-07-21 16:51:31,201 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 350 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:31,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 2027 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1813 Invalid, 0 Unknown, 294 Unchecked, 0.5s Time] [2022-07-21 16:51:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-21 16:51:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2022-07-21 16:51:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 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) [2022-07-21 16:51:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-07-21 16:51:31,203 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 134 [2022-07-21 16:51:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:31,203 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-07-21 16:51:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-07-21 16:51:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-21 16:51:31,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:31,204 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:31,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:31,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:31,420 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:31,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1309507799, now seen corresponding path program 21 times [2022-07-21 16:51:31,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:31,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663411192] [2022-07-21 16:51:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:31,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:32,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:32,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663411192] [2022-07-21 16:51:32,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663411192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:32,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170363278] [2022-07-21 16:51:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:32,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:32,066 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:32,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 16:51:32,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-21 16:51:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:32,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-21 16:51:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:32,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:32,992 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 [2022-07-21 16:51:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:32,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:33,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:33,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:33,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170363278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:33,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:33,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2022-07-21 16:51:33,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656236786] [2022-07-21 16:51:33,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:33,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 16:51:33,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:33,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 16:51:33,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 16:51:33,530 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:35,494 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2022-07-21 16:51:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 16:51:35,495 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 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 144 [2022-07-21 16:51:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:35,495 INFO L225 Difference]: With dead ends: 235 [2022-07-21 16:51:35,495 INFO L226 Difference]: Without dead ends: 152 [2022-07-21 16:51:35,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 256 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=471, Invalid=7185, Unknown=0, NotChecked=0, Total=7656 [2022-07-21 16:51:35,496 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 384 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 3217 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1985 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:35,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1985 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3217 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 16:51:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-21 16:51:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2022-07-21 16:51:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 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) [2022-07-21 16:51:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-07-21 16:51:35,498 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-07-21 16:51:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-07-21 16:51:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-07-21 16:51:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-21 16:51:35,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:35,499 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:35,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:35,700 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash -786568614, now seen corresponding path program 22 times [2022-07-21 16:51:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948332798] [2022-07-21 16:51:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:36,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:36,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948332798] [2022-07-21 16:51:36,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948332798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:36,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110658835] [2022-07-21 16:51:36,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:51:36,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:36,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:36,224 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:36,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 16:51:36,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:51:36,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 16:51:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:36,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:37,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:51:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:37,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110658835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:37,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:37,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2022-07-21 16:51:37,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997131138] [2022-07-21 16:51:37,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:37,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-21 16:51:37,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-21 16:51:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 16:51:37,444 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:38,583 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-07-21 16:51:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 16:51:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 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 148 [2022-07-21 16:51:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:38,584 INFO L225 Difference]: With dead ends: 160 [2022-07-21 16:51:38,584 INFO L226 Difference]: Without dead ends: 160 [2022-07-21 16:51:38,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1305, Invalid=5835, Unknown=0, NotChecked=0, Total=7140 [2022-07-21 16:51:38,585 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 591 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:38,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1421 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:51:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-21 16:51:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-07-21 16:51:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-07-21 16:51:38,587 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 148 [2022-07-21 16:51:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:38,587 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-07-21 16:51:38,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-07-21 16:51:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-21 16:51:38,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:38,588 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:38,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:38,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:38,789 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1411876178, now seen corresponding path program 23 times [2022-07-21 16:51:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:38,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86424704] [2022-07-21 16:51:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:39,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:39,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86424704] [2022-07-21 16:51:39,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86424704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:39,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851673162] [2022-07-21 16:51:39,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:51:39,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:39,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:39,474 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:39,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 16:51:39,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-21 16:51:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-21 16:51:39,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:39,758 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 [2022-07-21 16:51:40,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:41,471 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:41,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-21 16:51:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 325 proven. 698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:41,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:43,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:43,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 378 proven. 645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:44,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851673162] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:44,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:44,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 107 [2022-07-21 16:51:44,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654228759] [2022-07-21 16:51:44,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:44,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-21 16:51:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:44,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-21 16:51:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=10588, Unknown=0, NotChecked=0, Total=11342 [2022-07-21 16:51:44,465 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:46,730 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2022-07-21 16:51:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 16:51:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 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 154 [2022-07-21 16:51:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:46,731 INFO L225 Difference]: With dead ends: 262 [2022-07-21 16:51:46,731 INFO L226 Difference]: Without dead ends: 173 [2022-07-21 16:51:46,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1484, Invalid=19396, Unknown=0, NotChecked=0, Total=20880 [2022-07-21 16:51:46,733 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 373 mSDsluCounter, 3263 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 3328 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:46,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 3328 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2564 Invalid, 0 Unknown, 416 Unchecked, 0.8s Time] [2022-07-21 16:51:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-21 16:51:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2022-07-21 16:51:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-07-21 16:51:46,735 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 154 [2022-07-21 16:51:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:46,735 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-07-21 16:51:46,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-07-21 16:51:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-21 16:51:46,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:46,736 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:46,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-21 16:51:46,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:46,957 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1174241157, now seen corresponding path program 24 times [2022-07-21 16:51:46,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:46,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699414418] [2022-07-21 16:51:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:46,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699414418] [2022-07-21 16:51:47,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699414418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169738863] [2022-07-21 16:51:47,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:51:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:47,531 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:47,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 16:51:48,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-21 16:51:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:48,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-21 16:51:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:48,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:48,918 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 [2022-07-21 16:51:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:48,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:49,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:51:49,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:51:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:49,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169738863] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:49,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:49,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2022-07-21 16:51:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057313361] [2022-07-21 16:51:49,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:49,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 16:51:49,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 16:51:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3743, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 16:51:49,561 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:51,712 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2022-07-21 16:51:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 16:51:51,712 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 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 164 [2022-07-21 16:51:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:51,713 INFO L225 Difference]: With dead ends: 267 [2022-07-21 16:51:51,713 INFO L226 Difference]: Without dead ends: 172 [2022-07-21 16:51:51,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 292 SyntacticMatches, 12 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=523, Invalid=8983, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 16:51:51,714 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 528 mSDsluCounter, 2448 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 4163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:51,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 2513 Invalid, 4163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 16:51:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-21 16:51:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-07-21 16:51:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-07-21 16:51:51,717 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-07-21 16:51:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:51,717 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-07-21 16:51:51,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-07-21 16:51:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-21 16:51:51,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:51,718 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:51,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-21 16:51:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-21 16:51:51,928 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash -804976248, now seen corresponding path program 25 times [2022-07-21 16:51:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930936891] [2022-07-21 16:51:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930936891] [2022-07-21 16:51:52,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930936891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240336937] [2022-07-21 16:51:52,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:51:52,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:52,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:52,459 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:52,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 16:51:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:52,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-21 16:51:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:53,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:53,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:51:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240336937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:53,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37, 37] total 74 [2022-07-21 16:51:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962813023] [2022-07-21 16:51:53,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-21 16:51:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-21 16:51:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4996, Unknown=0, NotChecked=0, Total=5550 [2022-07-21 16:51:53,920 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 75 states, 74 states have (on average 4.608108108108108) internal successors, (341), 75 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:55,778 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-07-21 16:51:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 16:51:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 4.608108108108108) internal successors, (341), 75 states have internal predecessors, (341), 0 states have call successors, (0), 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 168 [2022-07-21 16:51:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:55,779 INFO L225 Difference]: With dead ends: 180 [2022-07-21 16:51:55,779 INFO L226 Difference]: Without dead ends: 180 [2022-07-21 16:51:55,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2141, Invalid=9631, Unknown=0, NotChecked=0, Total=11772 [2022-07-21 16:51:55,780 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1521 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:55,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 1568 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 16:51:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-21 16:51:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2022-07-21 16:51:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-07-21 16:51:55,782 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 168 [2022-07-21 16:51:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:55,782 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-07-21 16:51:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 4.608108108108108) internal successors, (341), 75 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-07-21 16:51:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-21 16:51:55,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:55,783 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:55,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:55,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 16:51:55,984 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:51:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash 67829596, now seen corresponding path program 26 times [2022-07-21 16:51:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:55,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103355818] [2022-07-21 16:51:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:55,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:56,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:56,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103355818] [2022-07-21 16:51:56,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103355818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:56,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115307104] [2022-07-21 16:51:56,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:56,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:56,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:56,680 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:56,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 16:51:56,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:56,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:56,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-21 16:51:56,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:57,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:59,168 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:59,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-21 16:51:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:59,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:01,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:52:01,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:52:01,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-21 16:52:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:01,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115307104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:01,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:01,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 104 [2022-07-21 16:52:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339171601] [2022-07-21 16:52:01,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:01,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-21 16:52:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-21 16:52:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=9988, Unknown=0, NotChecked=0, Total=10712 [2022-07-21 16:52:01,254 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:03,314 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2022-07-21 16:52:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 16:52:03,314 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-07-21 16:52:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:03,315 INFO L225 Difference]: With dead ends: 294 [2022-07-21 16:52:03,315 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 16:52:03,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 329 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1174, Invalid=15596, Unknown=0, NotChecked=0, Total=16770 [2022-07-21 16:52:03,317 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 412 mSDsluCounter, 3565 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 3638 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 552 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:03,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 3638 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2730 Invalid, 0 Unknown, 552 Unchecked, 0.7s Time] [2022-07-21 16:52:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 16:52:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 185. [2022-07-21 16:52:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-07-21 16:52:03,335 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2022-07-21 16:52:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:03,336 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-07-21 16:52:03,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-07-21 16:52:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-21 16:52:03,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:03,337 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:03,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 16:52:03,537 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:52:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1520473549, now seen corresponding path program 27 times [2022-07-21 16:52:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386302522] [2022-07-21 16:52:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:04,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:04,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386302522] [2022-07-21 16:52:04,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386302522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501468420] [2022-07-21 16:52:04,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:52:04,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:04,374 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:04,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 16:52:04,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-21 16:52:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-21 16:52:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:05,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:52:05,742 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 [2022-07-21 16:52:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:05,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:05,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:52:05,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:52:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:06,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501468420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:06,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:06,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 69 [2022-07-21 16:52:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201050512] [2022-07-21 16:52:06,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:06,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-21 16:52:06,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-21 16:52:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4515, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 16:52:06,193 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:08,330 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2022-07-21 16:52:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 16:52:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 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 184 [2022-07-21 16:52:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:08,331 INFO L225 Difference]: With dead ends: 299 [2022-07-21 16:52:08,331 INFO L226 Difference]: Without dead ends: 192 [2022-07-21 16:52:08,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 330 SyntacticMatches, 12 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=575, Invalid=10981, Unknown=0, NotChecked=0, Total=11556 [2022-07-21 16:52:08,332 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 496 mSDsluCounter, 3485 mSDsCounter, 0 mSdLazyCounter, 5589 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 3558 SdHoareTripleChecker+Invalid, 5805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:08,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 3558 Invalid, 5805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5589 Invalid, 0 Unknown, 111 Unchecked, 1.2s Time] [2022-07-21 16:52:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-21 16:52:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-07-21 16:52:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-07-21 16:52:08,335 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-07-21 16:52:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:08,335 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-07-21 16:52:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-07-21 16:52:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-21 16:52:08,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:08,336 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:08,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:08,555 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 16:52:08,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:08,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2146904906, now seen corresponding path program 28 times [2022-07-21 16:52:08,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:08,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610071789] [2022-07-21 16:52:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:08,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:09,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:09,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610071789] [2022-07-21 16:52:09,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610071789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:09,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247904321] [2022-07-21 16:52:09,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:52:09,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:09,166 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:09,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 16:52:09,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:52:09,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 16:52:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:09,509 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 [2022-07-21 16:52:09,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:52:11,182 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:11,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-21 16:52:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 833 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-07-21 16:52:11,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:14,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-21 16:52:14,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-21 16:52:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 800 proven. 136 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-07-21 16:52:14,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247904321] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:14,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:14,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 26, 26] total 87 [2022-07-21 16:52:14,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616879060] [2022-07-21 16:52:14,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:14,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-07-21 16:52:14,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:14,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-07-21 16:52:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=6595, Unknown=0, NotChecked=0, Total=7656 [2022-07-21 16:52:14,732 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 88 states, 87 states have (on average 4.804597701149425) internal successors, (418), 88 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:16,258 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2022-07-21 16:52:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 16:52:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 4.804597701149425) internal successors, (418), 88 states have internal predecessors, (418), 0 states have call successors, (0), 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 188 [2022-07-21 16:52:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:16,259 INFO L225 Difference]: With dead ends: 190 [2022-07-21 16:52:16,259 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 16:52:16,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 375 SyntacticMatches, 6 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4011 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2296, Invalid=14216, Unknown=0, NotChecked=0, Total=16512 [2022-07-21 16:52:16,260 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 347 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:16,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 2003 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 649 Invalid, 0 Unknown, 345 Unchecked, 0.2s Time] [2022-07-21 16:52:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 16:52:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 16:52:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 16:52:16,261 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 188 [2022-07-21 16:52:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:16,261 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 16:52:16,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 4.804597701149425) internal successors, (418), 88 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 16:52:16,262 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 16:52:16,279 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2022-07-21 16:52:16,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-07-21 16:52:16,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-07-21 16:52:16,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-07-21 16:52:16,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-07-21 16:52:16,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-07-21 16:52:16,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-07-21 16:52:16,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2022-07-21 16:52:16,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2022-07-21 16:52:16,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2022-07-21 16:52:16,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-07-21 16:52:16,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:16,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 16:52:16,490 INFO L356 BasicCegarLoop]: Path program histogram: [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:16,491 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 16:52:16,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:52:16 BoogieIcfgContainer [2022-07-21 16:52:16,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 16:52:16,493 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 16:52:16,493 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 16:52:16,493 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 16:52:16,494 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:50:37" (3/4) ... [2022-07-21 16:52:16,495 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 16:52:16,501 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-07-21 16:52:16,501 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-21 16:52:16,501 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 16:52:16,501 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 16:52:16,526 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 16:52:16,527 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 16:52:16,528 INFO L158 Benchmark]: Toolchain (without parser) took 99273.89ms. Allocated memory was 67.1MB in the beginning and 371.2MB in the end (delta: 304.1MB). Free memory was 48.7MB in the beginning and 252.4MB in the end (delta: -203.7MB). Peak memory consumption was 100.9MB. Max. memory is 16.1GB. [2022-07-21 16:52:16,529 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory was 48.9MB in the beginning and 48.9MB in the end (delta: 56.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 16:52:16,529 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.54ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 45.2MB in the end (delta: 3.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 16:52:16,529 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.75ms. Allocated memory is still 67.1MB. Free memory was 45.2MB in the beginning and 43.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 16:52:16,529 INFO L158 Benchmark]: Boogie Preprocessor took 36.71ms. Allocated memory is still 67.1MB. Free memory was 43.3MB in the beginning and 42.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 16:52:16,529 INFO L158 Benchmark]: RCFGBuilder took 287.68ms. Allocated memory is still 67.1MB. Free memory was 42.0MB in the beginning and 30.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 16:52:16,530 INFO L158 Benchmark]: TraceAbstraction took 98573.34ms. Allocated memory was 67.1MB in the beginning and 371.2MB in the end (delta: 304.1MB). Free memory was 30.0MB in the beginning and 255.6MB in the end (delta: -225.6MB). Peak memory consumption was 80.5MB. Max. memory is 16.1GB. [2022-07-21 16:52:16,530 INFO L158 Benchmark]: Witness Printer took 33.55ms. Allocated memory is still 371.2MB. Free memory was 255.6MB in the beginning and 252.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 16:52:16,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory was 48.9MB in the beginning and 48.9MB in the end (delta: 56.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.54ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 45.2MB in the end (delta: 3.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.75ms. Allocated memory is still 67.1MB. Free memory was 45.2MB in the beginning and 43.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.71ms. Allocated memory is still 67.1MB. Free memory was 43.3MB in the beginning and 42.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 287.68ms. Allocated memory is still 67.1MB. Free memory was 42.0MB in the beginning and 30.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 98573.34ms. Allocated memory was 67.1MB in the beginning and 371.2MB in the end (delta: 304.1MB). Free memory was 30.0MB in the beginning and 255.6MB in the end (delta: -225.6MB). Peak memory consumption was 80.5MB. Max. memory is 16.1GB. * Witness Printer took 33.55ms. Allocated memory is still 371.2MB. Free memory was 255.6MB in the beginning and 252.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 98.5s, OverallIterations: 39, TraceHistogramMax: 18, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 34.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10522 SdHoareTripleChecker+Valid, 13.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10522 mSDsluCounter, 34477 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2682 IncrementalHoareTripleChecker+Unchecked, 33040 mSDsCounter, 1622 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 42101 IncrementalHoareTripleChecker+Invalid, 46405 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1622 mSolverCounterUnsat, 1437 mSDtfsCounter, 42101 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7254 GetRequests, 5022 SyntacticMatches, 140 SemanticMatches, 2092 ConstructedPredicates, 0 IntricatePredicates, 18 DeprecatedPredicates, 31273 ImplicationChecksByTransitivity, 54.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=38, InterpolantAutomatonStates: 981, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 39 MinimizatonAttempts, 258 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 52.1s InterpolantComputationTime, 5768 NumberOfCodeBlocks, 5768 NumberOfCodeBlocksAsserted, 206 NumberOfCheckSat, 8507 ConstructedInterpolants, 706 QuantifiedInterpolants, 93455 SizeOfPredicates, 346 NumberOfNonLiveVariables, 10429 ConjunctsInSsa, 1844 ConjunctsInUnsatCore, 97 InterpolantComputations, 10 PerfectInterpolantSequences, 11152/44904 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-21 16:52:16,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE