./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/cstrspn-alloca-1.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 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:01:10,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:01:10,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:01:11,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:01:11,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:01:11,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:01:11,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:01:11,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:01:11,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:01:11,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:01:11,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:01:11,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:01:11,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:01:11,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:01:11,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:01:11,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:01:11,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:01:11,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:01:11,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:01:11,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:01:11,046 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:01:11,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:01:11,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:01:11,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:01:11,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:01:11,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:01:11,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:01:11,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:01:11,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:01:11,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:01:11,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:01:11,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:01:11,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:01:11,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:01:11,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:01:11,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:01:11,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:01:11,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:01:11,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:01:11,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:01:11,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:01:11,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:01:11,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:01:11,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:01:11,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:01:11,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:01:11,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:01:11,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:01:11,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:01:11,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:01:11,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:01:11,099 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:01:11,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:01:11,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:01:11,101 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:01:11,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:01:11,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:01:11,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:01:11,101 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:01:11,101 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:01:11,102 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:01:11,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:01:11,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:01:11,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:01:11,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:01:11,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:01:11,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:01:11,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:01:11,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:01:11,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:01:11,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:01:11,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:01:11,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:01:11,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2022-07-14 06:01:11,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:01:11,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:01:11,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:01:11,341 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:01:11,341 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:01:11,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2022-07-14 06:01:11,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e850614fc/3c411b1d991d415ca2ffa847d32967fe/FLAG5e5317765 [2022-07-14 06:01:11,828 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:01:11,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2022-07-14 06:01:11,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e850614fc/3c411b1d991d415ca2ffa847d32967fe/FLAG5e5317765 [2022-07-14 06:01:11,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e850614fc/3c411b1d991d415ca2ffa847d32967fe [2022-07-14 06:01:11,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:01:11,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:01:11,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:01:11,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:01:11,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:01:11,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:01:11" (1/1) ... [2022-07-14 06:01:11,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640ad6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:11, skipping insertion in model container [2022-07-14 06:01:11,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:01:11" (1/1) ... [2022-07-14 06:01:11,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:01:11,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:01:12,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:01:12,189 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:01:12,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:01:12,247 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:01:12,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12 WrapperNode [2022-07-14 06:01:12,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:01:12,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:01:12,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:01:12,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:01:12,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,281 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-07-14 06:01:12,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:01:12,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:01:12,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:01:12,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:01:12,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:01:12,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:01:12,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:01:12,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:01:12,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (1/1) ... [2022-07-14 06:01:12,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:01:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:12,344 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) [2022-07-14 06:01:12,347 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 [2022-07-14 06:01:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:01:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:01:12,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:01:12,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:01:12,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:01:12,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:01:12,445 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:01:12,446 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:01:12,665 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:01:12,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:01:12,673 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:01:12,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:01:12 BoogieIcfgContainer [2022-07-14 06:01:12,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:01:12,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:01:12,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:01:12,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:01:12,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:01:11" (1/3) ... [2022-07-14 06:01:12,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488d035d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:01:12, skipping insertion in model container [2022-07-14 06:01:12,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:01:12" (2/3) ... [2022-07-14 06:01:12,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488d035d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:01:12, skipping insertion in model container [2022-07-14 06:01:12,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:01:12" (3/3) ... [2022-07-14 06:01:12,688 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2022-07-14 06:01:12,701 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:01:12,701 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-14 06:01:12,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:01:12,740 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@57b00840, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@b1f88 [2022-07-14 06:01:12,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-14 06:01:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:01:12,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:12,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:12,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:12,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-14 06:01:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:12,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5684354] [2022-07-14 06:01:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:12,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:12,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5684354] [2022-07-14 06:01:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5684354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:12,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:12,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:12,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969433253] [2022-07-14 06:01:12,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:12,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:13,016 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:13,082 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-14 06:01:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:13,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:01:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:13,093 INFO L225 Difference]: With dead ends: 100 [2022-07-14 06:01:13,093 INFO L226 Difference]: Without dead ends: 96 [2022-07-14 06:01:13,096 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 [2022-07-14 06:01:13,125 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:13,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-14 06:01:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-07-14 06:01:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-14 06:01:13,177 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-07-14 06:01:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:13,177 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-14 06:01:13,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-14 06:01:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:01:13,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:13,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:13,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:01:13,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-14 06:01:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:13,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474506354] [2022-07-14 06:01:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:13,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:13,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474506354] [2022-07-14 06:01:13,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474506354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:13,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:13,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:01:13,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914198493] [2022-07-14 06:01:13,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:13,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:01:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:01:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:13,286 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:13,337 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-14 06:01:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:01:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:01:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:13,341 INFO L225 Difference]: With dead ends: 53 [2022-07-14 06:01:13,341 INFO L226 Difference]: Without dead ends: 53 [2022-07-14 06:01:13,345 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 [2022-07-14 06:01:13,346 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:13,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-14 06:01:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-14 06:01:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-14 06:01:13,363 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-14 06:01:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:13,363 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-14 06:01:13,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-14 06:01:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:01:13,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:13,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:13,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:01:13,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-14 06:01:13,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:13,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865916256] [2022-07-14 06:01:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:13,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:13,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:13,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865916256] [2022-07-14 06:01:13,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865916256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:13,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:13,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:13,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082545400] [2022-07-14 06:01:13,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:13,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:13,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:13,567 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:13,716 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-07-14 06:01:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:13,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:01:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:13,720 INFO L225 Difference]: With dead ends: 97 [2022-07-14 06:01:13,720 INFO L226 Difference]: Without dead ends: 97 [2022-07-14 06:01:13,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:01:13,724 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:13,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 96 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-14 06:01:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-07-14 06:01:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-14 06:01:13,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-07-14 06:01:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:13,730 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-14 06:01:13,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-14 06:01:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:01:13,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:13,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:13,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:01:13,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-14 06:01:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:13,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514271805] [2022-07-14 06:01:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:13,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514271805] [2022-07-14 06:01:13,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514271805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:13,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:13,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978477063] [2022-07-14 06:01:13,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:13,803 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:13,840 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-14 06:01:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 06:01:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:13,842 INFO L225 Difference]: With dead ends: 54 [2022-07-14 06:01:13,842 INFO L226 Difference]: Without dead ends: 54 [2022-07-14 06:01:13,843 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 [2022-07-14 06:01:13,849 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:13,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-14 06:01:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-14 06:01:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-14 06:01:13,853 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2022-07-14 06:01:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:13,853 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-14 06:01:13,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-14 06:01:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:01:13,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:13,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:13,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:01:13,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:13,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-14 06:01:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:13,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464143139] [2022-07-14 06:01:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:13,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:13,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:13,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464143139] [2022-07-14 06:01:13,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464143139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:13,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:13,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:13,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842796290] [2022-07-14 06:01:13,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:13,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:13,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:13,900 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:13,927 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-14 06:01:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:13,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 06:01:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:13,928 INFO L225 Difference]: With dead ends: 98 [2022-07-14 06:01:13,929 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 06:01:13,929 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 [2022-07-14 06:01:13,944 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:13,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 06:01:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-14 06:01:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-07-14 06:01:13,961 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2022-07-14 06:01:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:13,962 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-07-14 06:01:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-07-14 06:01:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:01:13,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:13,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:13,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:01:13,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-14 06:01:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:13,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192010198] [2022-07-14 06:01:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:13,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:14,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192010198] [2022-07-14 06:01:14,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192010198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:14,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:14,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:01:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825202919] [2022-07-14 06:01:14,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:14,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:01:14,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:14,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:01:14,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:14,036 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:14,070 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-07-14 06:01:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:01:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 06:01:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:14,071 INFO L225 Difference]: With dead ends: 63 [2022-07-14 06:01:14,071 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 06:01:14,071 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 [2022-07-14 06:01:14,072 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:14,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 06:01:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-14 06:01:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-14 06:01:14,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-14 06:01:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:14,076 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-14 06:01:14,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-14 06:01:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:01:14,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:14,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:14,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:01:14,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:14,078 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-14 06:01:14,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:14,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158420160] [2022-07-14 06:01:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:14,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:14,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:14,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158420160] [2022-07-14 06:01:14,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158420160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:14,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:14,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265316329] [2022-07-14 06:01:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:14,179 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:14,304 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-14 06:01:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 06:01:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:14,306 INFO L225 Difference]: With dead ends: 98 [2022-07-14 06:01:14,307 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 06:01:14,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:01:14,308 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:14,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 06:01:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-14 06:01:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-07-14 06:01:14,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2022-07-14 06:01:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:14,312 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-07-14 06:01:14,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-07-14 06:01:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:01:14,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:14,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:14,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 06:01:14,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-14 06:01:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:14,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719374267] [2022-07-14 06:01:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:14,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:14,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719374267] [2022-07-14 06:01:14,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719374267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:14,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:14,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:14,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500380312] [2022-07-14 06:01:14,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:14,427 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:14,466 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-07-14 06:01:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:14,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:01:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:14,469 INFO L225 Difference]: With dead ends: 64 [2022-07-14 06:01:14,469 INFO L226 Difference]: Without dead ends: 64 [2022-07-14 06:01:14,470 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 [2022-07-14 06:01:14,470 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:14,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-14 06:01:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-14 06:01:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-14 06:01:14,480 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2022-07-14 06:01:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:14,483 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-14 06:01:14,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-14 06:01:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:01:14,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:14,485 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:14,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:01:14,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-14 06:01:14,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:14,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199797806] [2022-07-14 06:01:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:14,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:14,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199797806] [2022-07-14 06:01:14,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199797806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674414125] [2022-07-14 06:01:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:14,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:14,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:14,631 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) [2022-07-14 06:01:14,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:01:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:01:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:01:14,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:01:14,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:01:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:15,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:15,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674414125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:15,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:15,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-14 06:01:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886698381] [2022-07-14 06:01:15,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:01:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:01:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:01:15,269 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:15,491 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-07-14 06:01:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:01:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:01:15,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:15,492 INFO L225 Difference]: With dead ends: 149 [2022-07-14 06:01:15,493 INFO L226 Difference]: Without dead ends: 149 [2022-07-14 06:01:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:01:15,495 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 207 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:15,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 281 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-14 06:01:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2022-07-14 06:01:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-14 06:01:15,507 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2022-07-14 06:01:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:15,508 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-14 06:01:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-14 06:01:15,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:01:15,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:15,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:15,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:15,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:15,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2022-07-14 06:01:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088260186] [2022-07-14 06:01:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:15,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:15,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:15,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088260186] [2022-07-14 06:01:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088260186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:15,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:15,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304525509] [2022-07-14 06:01:15,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:15,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:01:15,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:01:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:01:15,764 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:15,794 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-14 06:01:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:15,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 06:01:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:15,795 INFO L225 Difference]: With dead ends: 57 [2022-07-14 06:01:15,795 INFO L226 Difference]: Without dead ends: 57 [2022-07-14 06:01:15,795 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 [2022-07-14 06:01:15,796 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:15,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-14 06:01:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-14 06:01:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-14 06:01:15,799 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-14 06:01:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:15,799 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-14 06:01:15,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-14 06:01:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:01:15,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:15,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:15,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:01:15,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-14 06:01:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:15,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124209624] [2022-07-14 06:01:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:15,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124209624] [2022-07-14 06:01:15,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124209624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:15,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:15,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:01:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473911930] [2022-07-14 06:01:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:15,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:01:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:01:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:01:15,900 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:15,962 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-14 06:01:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 06:01:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:15,965 INFO L225 Difference]: With dead ends: 80 [2022-07-14 06:01:15,965 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 06:01:15,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:15,966 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:15,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 64 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 06:01:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-14 06:01:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-14 06:01:15,974 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2022-07-14 06:01:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:15,975 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-14 06:01:15,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-14 06:01:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:01:15,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:15,977 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:15,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:01:15,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-14 06:01:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:15,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398618260] [2022-07-14 06:01:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398618260] [2022-07-14 06:01:16,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398618260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963603351] [2022-07-14 06:01:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:16,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:16,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:16,155 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) [2022-07-14 06:01:16,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:01:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:01:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:16,245 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:16,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:01:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:16,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:16,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963603351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:16,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:16,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-14 06:01:16,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541180551] [2022-07-14 06:01:16,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:01:16,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:01:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:01:16,511 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:16,729 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2022-07-14 06:01:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:01:16,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:01:16,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:16,730 INFO L225 Difference]: With dead ends: 124 [2022-07-14 06:01:16,730 INFO L226 Difference]: Without dead ends: 124 [2022-07-14 06:01:16,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:01:16,732 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 258 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:16,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 232 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-14 06:01:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2022-07-14 06:01:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-14 06:01:16,738 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2022-07-14 06:01:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:16,738 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-14 06:01:16,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-14 06:01:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:01:16,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:16,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:16,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:16,958 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 [2022-07-14 06:01:16,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2022-07-14 06:01:16,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:16,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184875531] [2022-07-14 06:01:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:16,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:17,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:17,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184875531] [2022-07-14 06:01:17,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184875531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:17,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:17,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:17,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197469770] [2022-07-14 06:01:17,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:17,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:17,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:17,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:17,102 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:17,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:17,199 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-14 06:01:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:01:17,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:01:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:17,200 INFO L225 Difference]: With dead ends: 56 [2022-07-14 06:01:17,200 INFO L226 Difference]: Without dead ends: 53 [2022-07-14 06:01:17,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:17,201 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:17,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-14 06:01:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-14 06:01:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-14 06:01:17,203 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-07-14 06:01:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:17,203 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-14 06:01:17,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-14 06:01:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:01:17,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:17,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:17,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 06:01:17,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2022-07-14 06:01:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:17,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812426814] [2022-07-14 06:01:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:17,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:17,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812426814] [2022-07-14 06:01:17,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812426814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:17,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:17,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:01:17,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966347121] [2022-07-14 06:01:17,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:17,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:01:17,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:01:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:01:17,374 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:17,622 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-14 06:01:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:01:17,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:01:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:17,623 INFO L225 Difference]: With dead ends: 50 [2022-07-14 06:01:17,623 INFO L226 Difference]: Without dead ends: 50 [2022-07-14 06:01:17,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:01:17,624 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:17,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-14 06:01:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-14 06:01:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-14 06:01:17,626 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2022-07-14 06:01:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:17,626 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-14 06:01:17,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-14 06:01:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:01:17,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:17,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:17,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 06:01:17,627 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2022-07-14 06:01:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023512959] [2022-07-14 06:01:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:17,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:18,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:18,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023512959] [2022-07-14 06:01:18,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023512959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:18,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:18,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:01:18,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696497076] [2022-07-14 06:01:18,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:18,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:01:18,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:01:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:01:18,298 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:18,401 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-14 06:01:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:01:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:01:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:18,402 INFO L225 Difference]: With dead ends: 62 [2022-07-14 06:01:18,402 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 06:01:18,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:01:18,403 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:18,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 06:01:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-07-14 06:01:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-14 06:01:18,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2022-07-14 06:01:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:18,405 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-14 06:01:18,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-14 06:01:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 06:01:18,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:18,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:18,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 06:01:18,406 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2022-07-14 06:01:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:18,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860218265] [2022-07-14 06:01:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:18,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:18,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860218265] [2022-07-14 06:01:18,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860218265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:18,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:18,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:01:18,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161662100] [2022-07-14 06:01:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:18,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:01:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:01:18,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:01:18,439 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:18,446 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-07-14 06:01:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:01:18,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-14 06:01:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:18,447 INFO L225 Difference]: With dead ends: 59 [2022-07-14 06:01:18,447 INFO L226 Difference]: Without dead ends: 59 [2022-07-14 06:01:18,447 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 [2022-07-14 06:01:18,448 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:18,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-14 06:01:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-14 06:01:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-14 06:01:18,450 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2022-07-14 06:01:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:18,450 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-14 06:01:18,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-14 06:01:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:01:18,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:18,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:18,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 06:01:18,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2022-07-14 06:01:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:18,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992869573] [2022-07-14 06:01:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:18,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992869573] [2022-07-14 06:01:18,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992869573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:18,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:18,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:01:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518542750] [2022-07-14 06:01:18,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:18,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:01:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:01:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:01:18,545 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:18,618 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-07-14 06:01:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:01:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:01:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:18,619 INFO L225 Difference]: With dead ends: 71 [2022-07-14 06:01:18,619 INFO L226 Difference]: Without dead ends: 54 [2022-07-14 06:01:18,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:01:18,620 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:18,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 185 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:01:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-14 06:01:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-14 06:01:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-14 06:01:18,622 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2022-07-14 06:01:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:18,622 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-14 06:01:18,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-14 06:01:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:01:18,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:18,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:18,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 06:01:18,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2022-07-14 06:01:18,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:18,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976865915] [2022-07-14 06:01:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:18,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:18,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976865915] [2022-07-14 06:01:18,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976865915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:18,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:18,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:01:18,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563942236] [2022-07-14 06:01:18,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:18,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:01:18,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:18,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:01:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:01:18,753 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:18,848 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-07-14 06:01:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:01:18,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:01:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:18,850 INFO L225 Difference]: With dead ends: 74 [2022-07-14 06:01:18,850 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 06:01:18,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:01:18,850 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:18,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 06:01:18,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-14 06:01:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-07-14 06:01:18,853 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2022-07-14 06:01:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:18,853 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-07-14 06:01:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-07-14 06:01:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:01:18,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:18,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:18,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:01:18,855 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2022-07-14 06:01:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612426409] [2022-07-14 06:01:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:18,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612426409] [2022-07-14 06:01:18,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612426409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:18,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:18,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:01:18,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654982890] [2022-07-14 06:01:18,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:18,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:01:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:01:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:01:18,990 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:19,129 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-07-14 06:01:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:01:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-14 06:01:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:19,130 INFO L225 Difference]: With dead ends: 75 [2022-07-14 06:01:19,130 INFO L226 Difference]: Without dead ends: 75 [2022-07-14 06:01:19,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:01:19,131 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:19,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 187 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:01:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-14 06:01:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-14 06:01:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-14 06:01:19,133 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2022-07-14 06:01:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:19,133 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-14 06:01:19,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-14 06:01:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:01:19,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:19,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:19,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 06:01:19,134 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:19,135 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2022-07-14 06:01:19,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:19,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416401940] [2022-07-14 06:01:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:19,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:19,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:19,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416401940] [2022-07-14 06:01:19,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416401940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:19,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:19,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:01:19,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104004748] [2022-07-14 06:01:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:19,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:01:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:01:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:01:19,260 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:20,063 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-07-14 06:01:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:01:20,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-14 06:01:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:20,065 INFO L225 Difference]: With dead ends: 96 [2022-07-14 06:01:20,065 INFO L226 Difference]: Without dead ends: 96 [2022-07-14 06:01:20,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:01:20,065 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:20,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 197 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:01:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-14 06:01:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-07-14 06:01:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-07-14 06:01:20,068 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2022-07-14 06:01:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:20,068 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-07-14 06:01:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-07-14 06:01:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:01:20,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:20,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-14 06:01:20,069 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2022-07-14 06:01:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:20,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651720994] [2022-07-14 06:01:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:20,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651720994] [2022-07-14 06:01:20,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651720994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:01:20,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:01:20,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:01:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635304051] [2022-07-14 06:01:20,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:01:20,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:01:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:01:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:01:20,173 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:20,484 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-07-14 06:01:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:01:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 06:01:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:20,486 INFO L225 Difference]: With dead ends: 75 [2022-07-14 06:01:20,486 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 06:01:20,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:01:20,487 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:20,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 159 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:01:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 06:01:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-07-14 06:01:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-14 06:01:20,489 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2022-07-14 06:01:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:20,489 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-14 06:01:20,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-14 06:01:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:01:20,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:20,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-14 06:01:20,490 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2022-07-14 06:01:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:20,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508725721] [2022-07-14 06:01:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:20,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508725721] [2022-07-14 06:01:20,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508725721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729500997] [2022-07-14 06:01:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:20,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:20,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:20,832 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) [2022-07-14 06:01:20,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:01:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:20,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:01:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:21,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:21,255 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 [2022-07-14 06:01:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:21,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729500997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:21,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:21,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-14 06:01:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762220182] [2022-07-14 06:01:21,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:21,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:01:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:01:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:01:21,295 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:21,678 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-07-14 06:01:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:01:21,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-14 06:01:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:21,681 INFO L225 Difference]: With dead ends: 69 [2022-07-14 06:01:21,681 INFO L226 Difference]: Without dead ends: 65 [2022-07-14 06:01:21,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:01:21,682 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 458 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:21,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 143 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:01:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-14 06:01:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2022-07-14 06:01:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-14 06:01:21,684 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2022-07-14 06:01:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:21,684 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-14 06:01:21,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-14 06:01:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:01:21,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:21,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:21,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:21,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:21,899 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2022-07-14 06:01:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:21,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453855414] [2022-07-14 06:01:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:22,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:22,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453855414] [2022-07-14 06:01:22,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453855414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:22,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138227969] [2022-07-14 06:01:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:22,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:22,027 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) [2022-07-14 06:01:22,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:01:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:01:22,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:22,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:22,357 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 [2022-07-14 06:01:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:22,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138227969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:22,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:22,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-14 06:01:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364899689] [2022-07-14 06:01:22,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:22,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:01:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:01:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:01:22,385 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:22,732 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-07-14 06:01:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:01:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-14 06:01:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:22,733 INFO L225 Difference]: With dead ends: 86 [2022-07-14 06:01:22,733 INFO L226 Difference]: Without dead ends: 86 [2022-07-14 06:01:22,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:01:22,734 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 344 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:22,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 190 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:01:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-14 06:01:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2022-07-14 06:01:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-07-14 06:01:22,736 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2022-07-14 06:01:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:22,736 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-07-14 06:01:22,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-07-14 06:01:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 06:01:22,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:22,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:22,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:22,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:22,960 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2022-07-14 06:01:22,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:22,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150540136] [2022-07-14 06:01:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:22,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:23,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:23,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150540136] [2022-07-14 06:01:23,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150540136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:23,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749436399] [2022-07-14 06:01:23,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:01:23,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:23,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:23,236 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) [2022-07-14 06:01:23,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:01:23,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:01:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:01:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:23,342 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:23,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:01:23,441 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 [2022-07-14 06:01:23,817 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:23,817 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 [2022-07-14 06:01:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:24,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:24,699 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 [2022-07-14 06:01:24,704 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 [2022-07-14 06:01:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:25,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749436399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:25,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:25,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-07-14 06:01:25,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184794417] [2022-07-14 06:01:25,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:25,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 06:01:25,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 06:01:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:01:25,239 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:26,284 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-07-14 06:01:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:01:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-14 06:01:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:26,285 INFO L225 Difference]: With dead ends: 94 [2022-07-14 06:01:26,285 INFO L226 Difference]: Without dead ends: 91 [2022-07-14 06:01:26,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=2431, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:01:26,287 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 129 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:26,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 427 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 291 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-07-14 06:01:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-14 06:01:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2022-07-14 06:01:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 84 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-07-14 06:01:26,289 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 36 [2022-07-14 06:01:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:26,290 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-07-14 06:01:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-07-14 06:01:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:01:26,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:26,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:26,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:26,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-14 06:01:26,491 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2022-07-14 06:01:26,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:26,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001640287] [2022-07-14 06:01:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:26,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:26,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001640287] [2022-07-14 06:01:26,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001640287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:26,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897707924] [2022-07-14 06:01:26,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:01:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:26,856 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) [2022-07-14 06:01:26,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:01:26,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:01:26,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:01:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:26,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:01:27,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:01:27,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:01:28,138 INFO L356 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-07-14 06:01:28,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 20 [2022-07-14 06:01:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:28,607 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_295 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_295) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select v_ArrVal_295 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse0 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (or (not (= .cse0 .cse1)) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) .cse1)) (= .cse0 0))))) is different from false [2022-07-14 06:01:28,615 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:28,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2022-07-14 06:01:28,633 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-14 06:01:28,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 88 [2022-07-14 06:01:28,670 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-14 06:01:28,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 62 [2022-07-14 06:01:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:28,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897707924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:28,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:28,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 20] total 45 [2022-07-14 06:01:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544542688] [2022-07-14 06:01:28,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:28,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 06:01:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 06:01:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1723, Unknown=1, NotChecked=84, Total=1980 [2022-07-14 06:01:28,923 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 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) [2022-07-14 06:01:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:30,138 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-07-14 06:01:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:01:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 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) Word has length 46 [2022-07-14 06:01:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:30,140 INFO L225 Difference]: With dead ends: 152 [2022-07-14 06:01:30,140 INFO L226 Difference]: Without dead ends: 129 [2022-07-14 06:01:30,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=518, Invalid=3145, Unknown=1, NotChecked=118, Total=3782 [2022-07-14 06:01:30,142 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 296 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:30,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 356 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 321 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-07-14 06:01:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-14 06:01:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2022-07-14 06:01:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 1.113821138211382) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2022-07-14 06:01:30,145 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 46 [2022-07-14 06:01:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:30,146 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2022-07-14 06:01:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 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) [2022-07-14 06:01:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2022-07-14 06:01:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:01:30,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:30,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:30,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:30,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:30,368 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 3 times [2022-07-14 06:01:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:30,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136390894] [2022-07-14 06:01:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:30,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:30,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:30,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136390894] [2022-07-14 06:01:30,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136390894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:30,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545082805] [2022-07-14 06:01:30,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:01:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:30,783 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) [2022-07-14 06:01:30,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:01:30,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:01:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:01:30,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:30,990 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 [2022-07-14 06:01:31,167 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 [2022-07-14 06:01:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:31,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:31,264 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 [2022-07-14 06:01:31,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:01:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:31,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545082805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:31,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:31,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-07-14 06:01:31,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125941897] [2022-07-14 06:01:31,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:31,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:01:31,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:01:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:01:31,397 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:32,660 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2022-07-14 06:01:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:01:32,661 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 06:01:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:32,662 INFO L225 Difference]: With dead ends: 219 [2022-07-14 06:01:32,662 INFO L226 Difference]: Without dead ends: 194 [2022-07-14 06:01:32,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=420, Invalid=2442, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:01:32,663 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 305 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:32,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 827 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 693 Invalid, 0 Unknown, 178 Unchecked, 0.4s Time] [2022-07-14 06:01:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-14 06:01:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2022-07-14 06:01:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 145 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2022-07-14 06:01:32,667 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 46 [2022-07-14 06:01:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:32,667 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2022-07-14 06:01:32,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2022-07-14 06:01:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:01:32,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:32,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:32,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:32,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:32,884 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 4 times [2022-07-14 06:01:32,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:32,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230989903] [2022-07-14 06:01:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:32,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:33,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:33,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230989903] [2022-07-14 06:01:33,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230989903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:33,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140953591] [2022-07-14 06:01:33,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:01:33,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:33,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:33,069 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) [2022-07-14 06:01:33,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:01:33,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:01:33,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-14 06:01:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:33,185 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:33,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:01:33,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:01:33,739 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:33,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:01:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:33,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:34,472 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 [2022-07-14 06:01:34,478 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 [2022-07-14 06:01:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:35,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140953591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:35,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:35,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2022-07-14 06:01:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763652302] [2022-07-14 06:01:35,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:01:35,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:01:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:01:35,519 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 42 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:37,180 INFO L93 Difference]: Finished difference Result 269 states and 290 transitions. [2022-07-14 06:01:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:01:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 42 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-14 06:01:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:37,182 INFO L225 Difference]: With dead ends: 269 [2022-07-14 06:01:37,182 INFO L226 Difference]: Without dead ends: 269 [2022-07-14 06:01:37,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=752, Invalid=3280, Unknown=0, NotChecked=0, Total=4032 [2022-07-14 06:01:37,183 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 787 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:37,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 766 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1013 Invalid, 0 Unknown, 67 Unchecked, 0.6s Time] [2022-07-14 06:01:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-14 06:01:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 170. [2022-07-14 06:01:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 1.1071428571428572) internal successors, (186), 169 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) [2022-07-14 06:01:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2022-07-14 06:01:37,205 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 50 [2022-07-14 06:01:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:37,206 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2022-07-14 06:01:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 42 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2022-07-14 06:01:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:01:37,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:37,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:37,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:37,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-14 06:01:37,426 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2022-07-14 06:01:37,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:37,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550519292] [2022-07-14 06:01:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:37,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:37,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:37,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550519292] [2022-07-14 06:01:37,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550519292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272294068] [2022-07-14 06:01:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:01:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:37,585 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) [2022-07-14 06:01:37,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:01:37,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:01:37,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 06:01:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:38,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:38,179 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 7 treesize of output 5 [2022-07-14 06:01:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:38,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272294068] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:38,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:38,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-07-14 06:01:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075761145] [2022-07-14 06:01:38,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:38,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:01:38,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:01:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:01:38,225 INFO L87 Difference]: Start difference. First operand 170 states and 186 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 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) [2022-07-14 06:01:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:38,483 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2022-07-14 06:01:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:01:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 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) Word has length 50 [2022-07-14 06:01:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:38,485 INFO L225 Difference]: With dead ends: 213 [2022-07-14 06:01:38,485 INFO L226 Difference]: Without dead ends: 213 [2022-07-14 06:01:38,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:01:38,486 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 388 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:38,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 320 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:01:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-14 06:01:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2022-07-14 06:01:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 1.1117021276595744) internal successors, (209), 189 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 209 transitions. [2022-07-14 06:01:38,497 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 209 transitions. Word has length 50 [2022-07-14 06:01:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:38,497 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 209 transitions. [2022-07-14 06:01:38,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 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) [2022-07-14 06:01:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 209 transitions. [2022-07-14 06:01:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:01:38,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:38,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:38,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:38,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-14 06:01:38,710 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1672384838, now seen corresponding path program 1 times [2022-07-14 06:01:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:38,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460728705] [2022-07-14 06:01:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:38,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:01:39,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460728705] [2022-07-14 06:01:39,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460728705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435257886] [2022-07-14 06:01:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:39,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:39,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:39,032 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) [2022-07-14 06:01:39,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:01:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:39,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:01:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:39,436 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 [2022-07-14 06:01:39,751 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 [2022-07-14 06:01:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:01:39,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:39,972 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 [2022-07-14 06:01:39,975 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 [2022-07-14 06:01:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:01:40,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435257886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:40,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:40,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2022-07-14 06:01:40,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657933871] [2022-07-14 06:01:40,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:40,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-14 06:01:40,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:40,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-14 06:01:40,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:01:40,195 INFO L87 Difference]: Start difference. First operand 190 states and 209 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:40,558 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2022-07-14 06:01:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:01:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-14 06:01:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:40,559 INFO L225 Difference]: With dead ends: 233 [2022-07-14 06:01:40,559 INFO L226 Difference]: Without dead ends: 227 [2022-07-14 06:01:40,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:01:40,560 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 216 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:40,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 405 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-07-14 06:01:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-14 06:01:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-07-14 06:01:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.0982142857142858) internal successors, (246), 225 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 246 transitions. [2022-07-14 06:01:40,573 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 246 transitions. Word has length 53 [2022-07-14 06:01:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:40,575 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 246 transitions. [2022-07-14 06:01:40,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 246 transitions. [2022-07-14 06:01:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:01:40,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:40,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:40,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-14 06:01:40,799 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1104896393, now seen corresponding path program 2 times [2022-07-14 06:01:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904809319] [2022-07-14 06:01:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:01:40,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904809319] [2022-07-14 06:01:40,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904809319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:40,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831994688] [2022-07-14 06:01:40,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:01:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:40,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:40,948 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) [2022-07-14 06:01:40,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:01:41,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:01:41,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:41,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:01:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:01:41,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:41,468 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 [2022-07-14 06:01:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:01:41,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831994688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:41,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:41,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-07-14 06:01:41,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331684530] [2022-07-14 06:01:41,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:41,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:01:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:01:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:01:41,492 INFO L87 Difference]: Start difference. First operand 226 states and 246 transitions. Second operand has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:41,925 INFO L93 Difference]: Finished difference Result 294 states and 317 transitions. [2022-07-14 06:01:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:01:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 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 57 [2022-07-14 06:01:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:41,927 INFO L225 Difference]: With dead ends: 294 [2022-07-14 06:01:41,927 INFO L226 Difference]: Without dead ends: 294 [2022-07-14 06:01:41,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:01:41,928 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 287 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:41,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 346 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:01:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-14 06:01:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 238. [2022-07-14 06:01:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 236 states have (on average 1.1016949152542372) internal successors, (260), 237 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 260 transitions. [2022-07-14 06:01:41,937 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 260 transitions. Word has length 57 [2022-07-14 06:01:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:41,938 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 260 transitions. [2022-07-14 06:01:41,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 260 transitions. [2022-07-14 06:01:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 06:01:41,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:41,939 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:41,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:42,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:42,159 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1550124260, now seen corresponding path program 5 times [2022-07-14 06:01:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460247622] [2022-07-14 06:01:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:42,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:42,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460247622] [2022-07-14 06:01:42,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460247622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:42,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483624021] [2022-07-14 06:01:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:01:42,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:42,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:42,336 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) [2022-07-14 06:01:42,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:01:42,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:01:42,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:42,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:01:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:42,452 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:42,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:01:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:42,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:01:43,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483624021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:43,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:43,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2022-07-14 06:01:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629271551] [2022-07-14 06:01:43,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:01:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:01:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:01:43,041 INFO L87 Difference]: Start difference. First operand 238 states and 260 transitions. Second operand has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:43,756 INFO L93 Difference]: Finished difference Result 539 states and 580 transitions. [2022-07-14 06:01:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:01:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-14 06:01:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:43,759 INFO L225 Difference]: With dead ends: 539 [2022-07-14 06:01:43,759 INFO L226 Difference]: Without dead ends: 506 [2022-07-14 06:01:43,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=772, Invalid=2198, Unknown=0, NotChecked=0, Total=2970 [2022-07-14 06:01:43,761 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 558 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:43,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 363 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:01:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-14 06:01:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 332. [2022-07-14 06:01:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 330 states have (on average 1.1151515151515152) internal successors, (368), 331 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 368 transitions. [2022-07-14 06:01:43,786 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 368 transitions. Word has length 62 [2022-07-14 06:01:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:43,787 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 368 transitions. [2022-07-14 06:01:43,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 368 transitions. [2022-07-14 06:01:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-14 06:01:43,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:43,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:43,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:43,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:44,000 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:44,001 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 4 times [2022-07-14 06:01:44,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:44,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746249070] [2022-07-14 06:01:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:44,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746249070] [2022-07-14 06:01:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746249070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561258704] [2022-07-14 06:01:44,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:01:44,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:44,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:44,728 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) [2022-07-14 06:01:44,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:01:44,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:01:44,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-14 06:01:44,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:44,913 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:44,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:01:44,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:01:45,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:01:45,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-14 06:01:49,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:01:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:49,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:53,195 INFO L356 Elim1Store]: treesize reduction 46, result has 37.8 percent of original size [2022-07-14 06:01:53,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 374 treesize of output 301 [2022-07-14 06:01:53,210 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:53,211 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 271 treesize of output 255 [2022-07-14 06:01:53,351 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 100 treesize of output 94 [2022-07-14 06:01:53,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:53,432 INFO L356 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2022-07-14 06:01:53,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 104 [2022-07-14 06:01:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:54,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:54,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561258704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:54,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:54,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 25] total 65 [2022-07-14 06:01:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399415736] [2022-07-14 06:01:54,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:54,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-14 06:01:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-14 06:01:54,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3841, Unknown=1, NotChecked=0, Total=4160 [2022-07-14 06:01:54,488 INFO L87 Difference]: Start difference. First operand 332 states and 368 transitions. Second operand has 65 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 65 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:58,873 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2022-07-14 06:01:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-14 06:01:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 65 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-14 06:01:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:58,875 INFO L225 Difference]: With dead ends: 520 [2022-07-14 06:01:58,875 INFO L226 Difference]: Without dead ends: 485 [2022-07-14 06:01:58,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=793, Invalid=7947, Unknown=2, NotChecked=0, Total=8742 [2022-07-14 06:01:58,878 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 266 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:58,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 733 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 621 Invalid, 0 Unknown, 426 Unchecked, 0.4s Time] [2022-07-14 06:01:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-14 06:01:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 482. [2022-07-14 06:01:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 480 states have (on average 1.1104166666666666) internal successors, (533), 481 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 533 transitions. [2022-07-14 06:01:58,888 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 533 transitions. Word has length 63 [2022-07-14 06:01:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:58,889 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 533 transitions. [2022-07-14 06:01:58,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 65 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 533 transitions. [2022-07-14 06:01:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-14 06:01:58,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:58,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:58,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:01:59,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-14 06:01:59,104 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 3 times [2022-07-14 06:01:59,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:59,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463062711] [2022-07-14 06:01:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:59,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:01:59,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463062711] [2022-07-14 06:01:59,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463062711] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697072996] [2022-07-14 06:01:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:01:59,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:59,824 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) [2022-07-14 06:01:59,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:01:59,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:01:59,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:59,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-14 06:01:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:00,092 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 [2022-07-14 06:02:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:00,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:00,552 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 [2022-07-14 06:02:00,554 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 [2022-07-14 06:02:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:00,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697072996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:00,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:00,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 35 [2022-07-14 06:02:00,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699308353] [2022-07-14 06:02:00,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:00,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:02:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:02:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:02:00,686 INFO L87 Difference]: Start difference. First operand 482 states and 533 transitions. Second operand has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 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) [2022-07-14 06:02:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:02,847 INFO L93 Difference]: Finished difference Result 747 states and 818 transitions. [2022-07-14 06:02:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-14 06:02:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 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 63 [2022-07-14 06:02:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:02,858 INFO L225 Difference]: With dead ends: 747 [2022-07-14 06:02:02,859 INFO L226 Difference]: Without dead ends: 735 [2022-07-14 06:02:02,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=491, Invalid=3415, Unknown=0, NotChecked=0, Total=3906 [2022-07-14 06:02:02,860 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 404 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:02,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 966 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1020 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-07-14 06:02:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-07-14 06:02:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 597. [2022-07-14 06:02:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 595 states have (on average 1.1025210084033614) internal successors, (656), 596 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 656 transitions. [2022-07-14 06:02:02,872 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 656 transitions. Word has length 63 [2022-07-14 06:02:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:02,872 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 656 transitions. [2022-07-14 06:02:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 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) [2022-07-14 06:02:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 656 transitions. [2022-07-14 06:02:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:02:02,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:02,874 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:02,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:03,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:03,095 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 6 times [2022-07-14 06:02:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:03,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031721230] [2022-07-14 06:02:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:03,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:03,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:03,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031721230] [2022-07-14 06:02:03,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031721230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:03,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123883679] [2022-07-14 06:02:03,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:02:03,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:03,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:03,315 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) [2022-07-14 06:02:03,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:02:03,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:02:03,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:03,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:02:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:03,555 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 [2022-07-14 06:02:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:03,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:03,885 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 [2022-07-14 06:02:03,886 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 [2022-07-14 06:02:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:04,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123883679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:04,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:04,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-07-14 06:02:04,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230541550] [2022-07-14 06:02:04,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:04,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:02:04,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:04,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:02:04,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:02:04,023 INFO L87 Difference]: Start difference. First operand 597 states and 656 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:04,837 INFO L93 Difference]: Finished difference Result 959 states and 1041 transitions. [2022-07-14 06:02:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:02:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-14 06:02:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:04,840 INFO L225 Difference]: With dead ends: 959 [2022-07-14 06:02:04,840 INFO L226 Difference]: Without dead ends: 915 [2022-07-14 06:02:04,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=2203, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:02:04,842 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 618 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:04,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1416 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1199 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-07-14 06:02:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-07-14 06:02:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 609. [2022-07-14 06:02:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 607 states have (on average 1.1037891268533773) internal successors, (670), 608 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 670 transitions. [2022-07-14 06:02:04,852 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 670 transitions. Word has length 66 [2022-07-14 06:02:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 670 transitions. [2022-07-14 06:02:04,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 670 transitions. [2022-07-14 06:02:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 06:02:04,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:04,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:04,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:05,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:05,068 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1057469728, now seen corresponding path program 4 times [2022-07-14 06:02:05,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951359529] [2022-07-14 06:02:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:05,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:05,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:05,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951359529] [2022-07-14 06:02:05,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951359529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295066925] [2022-07-14 06:02:05,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:02:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:05,264 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) [2022-07-14 06:02:05,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:02:05,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:02:05,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:05,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-14 06:02:05,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:05,361 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:02:05,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:02:05,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:02:05,766 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:05,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:02:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:05,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:06,458 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 [2022-07-14 06:02:06,460 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 [2022-07-14 06:02:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:07,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295066925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:07,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:07,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2022-07-14 06:02:07,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354384754] [2022-07-14 06:02:07,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:07,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:02:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:07,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:02:07,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:02:07,045 INFO L87 Difference]: Start difference. First operand 609 states and 670 transitions. Second operand has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:08,210 INFO L93 Difference]: Finished difference Result 1019 states and 1105 transitions. [2022-07-14 06:02:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:02:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-14 06:02:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:08,213 INFO L225 Difference]: With dead ends: 1019 [2022-07-14 06:02:08,214 INFO L226 Difference]: Without dead ends: 1018 [2022-07-14 06:02:08,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=712, Invalid=3320, Unknown=0, NotChecked=0, Total=4032 [2022-07-14 06:02:08,216 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 444 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:08,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 763 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1036 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2022-07-14 06:02:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-07-14 06:02:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 757. [2022-07-14 06:02:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 755 states have (on average 1.1019867549668874) internal successors, (832), 756 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 832 transitions. [2022-07-14 06:02:08,234 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 832 transitions. Word has length 67 [2022-07-14 06:02:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:08,234 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 832 transitions. [2022-07-14 06:02:08,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 832 transitions. [2022-07-14 06:02:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 06:02:08,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:08,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:08,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:08,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-14 06:02:08,452 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1668022213, now seen corresponding path program 5 times [2022-07-14 06:02:08,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:08,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332737012] [2022-07-14 06:02:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:08,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:08,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:08,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332737012] [2022-07-14 06:02:08,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332737012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:08,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22454991] [2022-07-14 06:02:08,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:02:08,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:08,608 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) [2022-07-14 06:02:08,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:02:08,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:02:08,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 06:02:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:09,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:09,714 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 7 treesize of output 5 [2022-07-14 06:02:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:09,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22454991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:09,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:09,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-07-14 06:02:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583476279] [2022-07-14 06:02:09,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:02:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:02:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:02:09,746 INFO L87 Difference]: Start difference. First operand 757 states and 832 transitions. Second operand has 27 states, 26 states have (on average 6.653846153846154) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:10,167 INFO L93 Difference]: Finished difference Result 1178 states and 1301 transitions. [2022-07-14 06:02:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:02:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 6.653846153846154) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 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 67 [2022-07-14 06:02:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:10,171 INFO L225 Difference]: With dead ends: 1178 [2022-07-14 06:02:10,171 INFO L226 Difference]: Without dead ends: 1178 [2022-07-14 06:02:10,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:02:10,172 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 362 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:10,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 557 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:02:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-14 06:02:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 890. [2022-07-14 06:02:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 888 states have (on average 1.1036036036036037) internal successors, (980), 889 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 980 transitions. [2022-07-14 06:02:10,195 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 980 transitions. Word has length 67 [2022-07-14 06:02:10,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:10,195 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 980 transitions. [2022-07-14 06:02:10,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 6.653846153846154) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 980 transitions. [2022-07-14 06:02:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-14 06:02:10,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:10,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:10,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:10,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:10,425 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:10,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1055980246, now seen corresponding path program 7 times [2022-07-14 06:02:10,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:10,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998123770] [2022-07-14 06:02:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:10,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:10,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998123770] [2022-07-14 06:02:10,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998123770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305860493] [2022-07-14 06:02:10,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:02:10,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:10,976 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) [2022-07-14 06:02:11,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 06:02:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:11,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 06:02:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:11,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:11,723 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 [2022-07-14 06:02:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:11,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305860493] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:11,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:11,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-14 06:02:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391544975] [2022-07-14 06:02:11,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:11,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:02:11,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:02:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:02:11,767 INFO L87 Difference]: Start difference. First operand 890 states and 980 transitions. Second operand has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 36 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:12,748 INFO L93 Difference]: Finished difference Result 1609 states and 1764 transitions. [2022-07-14 06:02:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:02:12,749 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 36 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-14 06:02:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:12,759 INFO L225 Difference]: With dead ends: 1609 [2022-07-14 06:02:12,759 INFO L226 Difference]: Without dead ends: 1609 [2022-07-14 06:02:12,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:02:12,765 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 601 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:12,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 960 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 06:02:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-07-14 06:02:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 875. [2022-07-14 06:02:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 873 states have (on average 1.1088201603665522) internal successors, (968), 874 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 968 transitions. [2022-07-14 06:02:12,799 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 968 transitions. Word has length 70 [2022-07-14 06:02:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:12,799 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 968 transitions. [2022-07-14 06:02:12,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 36 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 968 transitions. [2022-07-14 06:02:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:02:12,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:12,816 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:12,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:13,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:13,017 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2120159335, now seen corresponding path program 1 times [2022-07-14 06:02:13,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:13,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019444862] [2022-07-14 06:02:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:13,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:02:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019444862] [2022-07-14 06:02:13,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019444862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473430760] [2022-07-14 06:02:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:13,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:13,253 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) [2022-07-14 06:02:13,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:02:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:13,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:02:13,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:13,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:02:13,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:02:13,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:02:13,807 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 [2022-07-14 06:02:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:02:13,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:13,883 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_766) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:02:13,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:13,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:02:13,893 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:13,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:02:13,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:02:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:02:14,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473430760] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:14,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:14,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2022-07-14 06:02:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708637629] [2022-07-14 06:02:14,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:14,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:02:14,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:02:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=478, Unknown=1, NotChecked=44, Total=600 [2022-07-14 06:02:14,063 INFO L87 Difference]: Start difference. First operand 875 states and 968 transitions. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:14,358 INFO L93 Difference]: Finished difference Result 908 states and 1002 transitions. [2022-07-14 06:02:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:02:14,359 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-14 06:02:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:14,361 INFO L225 Difference]: With dead ends: 908 [2022-07-14 06:02:14,361 INFO L226 Difference]: Without dead ends: 804 [2022-07-14 06:02:14,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=850, Unknown=1, NotChecked=60, Total=1056 [2022-07-14 06:02:14,362 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:14,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 400 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-14 06:02:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-07-14 06:02:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 757. [2022-07-14 06:02:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 755 states have (on average 1.1152317880794702) internal successors, (842), 756 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 842 transitions. [2022-07-14 06:02:14,376 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 842 transitions. Word has length 73 [2022-07-14 06:02:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:14,377 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 842 transitions. [2022-07-14 06:02:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 842 transitions. [2022-07-14 06:02:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:02:14,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:14,384 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:14,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:14,599 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1844856972, now seen corresponding path program 5 times [2022-07-14 06:02:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:14,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91012023] [2022-07-14 06:02:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:14,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91012023] [2022-07-14 06:02:14,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91012023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:14,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166116330] [2022-07-14 06:02:14,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:02:14,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:14,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:14,810 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) [2022-07-14 06:02:14,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 06:02:14,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:02:14,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:02:14,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:15,000 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:02:15,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:02:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:15,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:15,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166116330] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:15,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:15,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-14 06:02:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048690180] [2022-07-14 06:02:15,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:15,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-14 06:02:15,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:15,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-14 06:02:15,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:02:15,732 INFO L87 Difference]: Start difference. First operand 757 states and 842 transitions. Second operand has 30 states, 29 states have (on average 5.448275862068965) internal successors, (158), 30 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:16,263 INFO L93 Difference]: Finished difference Result 1046 states and 1143 transitions. [2022-07-14 06:02:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:02:16,263 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.448275862068965) internal successors, (158), 30 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-14 06:02:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:16,266 INFO L225 Difference]: With dead ends: 1046 [2022-07-14 06:02:16,266 INFO L226 Difference]: Without dead ends: 1046 [2022-07-14 06:02:16,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:02:16,267 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 300 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:16,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 460 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:02:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-07-14 06:02:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 878. [2022-07-14 06:02:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 876 states have (on average 1.1130136986301369) internal successors, (975), 877 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 975 transitions. [2022-07-14 06:02:16,280 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 975 transitions. Word has length 73 [2022-07-14 06:02:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:16,280 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 975 transitions. [2022-07-14 06:02:16,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.448275862068965) internal successors, (158), 30 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 975 transitions. [2022-07-14 06:02:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:02:16,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:16,282 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:16,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:16,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-14 06:02:16,506 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash -429292212, now seen corresponding path program 6 times [2022-07-14 06:02:16,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:16,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965780860] [2022-07-14 06:02:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:16,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:16,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965780860] [2022-07-14 06:02:16,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965780860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:16,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333809572] [2022-07-14 06:02:16,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:02:16,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:16,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:16,883 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) [2022-07-14 06:02:16,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 06:02:17,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-14 06:02:17,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-14 06:02:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:17,108 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 [2022-07-14 06:02:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-14 06:02:17,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:17,534 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 [2022-07-14 06:02:17,536 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 [2022-07-14 06:02:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-14 06:02:17,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333809572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:17,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:17,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 33 [2022-07-14 06:02:17,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407341135] [2022-07-14 06:02:17,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:17,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:02:17,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:02:17,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:02:17,656 INFO L87 Difference]: Start difference. First operand 878 states and 975 transitions. Second operand has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:19,101 INFO L93 Difference]: Finished difference Result 915 states and 997 transitions. [2022-07-14 06:02:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:02:19,102 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-14 06:02:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:19,105 INFO L225 Difference]: With dead ends: 915 [2022-07-14 06:02:19,105 INFO L226 Difference]: Without dead ends: 906 [2022-07-14 06:02:19,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=2986, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:02:19,106 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 432 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:19,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 817 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 901 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-07-14 06:02:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-07-14 06:02:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 781. [2022-07-14 06:02:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 779 states have (on average 1.1065468549422337) internal successors, (862), 780 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 862 transitions. [2022-07-14 06:02:19,140 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 862 transitions. Word has length 73 [2022-07-14 06:02:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:19,141 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 862 transitions. [2022-07-14 06:02:19,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 862 transitions. [2022-07-14 06:02:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-14 06:02:19,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:19,143 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:19,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:19,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-14 06:02:19,358 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 8 times [2022-07-14 06:02:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:19,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952048071] [2022-07-14 06:02:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:19,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:19,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952048071] [2022-07-14 06:02:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952048071] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103515331] [2022-07-14 06:02:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:02:19,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:19,655 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) [2022-07-14 06:02:19,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 06:02:19,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:02:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:19,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:02:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:19,853 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:02:19,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:02:20,116 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 [2022-07-14 06:02:21,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:21,032 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 [2022-07-14 06:02:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 28 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:21,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:22,290 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 [2022-07-14 06:02:22,294 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 [2022-07-14 06:02:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 45 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:23,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103515331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:23,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:23,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-07-14 06:02:23,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239278178] [2022-07-14 06:02:23,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:23,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-14 06:02:23,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-14 06:02:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3390, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:02:23,249 INFO L87 Difference]: Start difference. First operand 781 states and 862 transitions. Second operand has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:25,942 INFO L93 Difference]: Finished difference Result 1324 states and 1441 transitions. [2022-07-14 06:02:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:02:25,943 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-14 06:02:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:25,946 INFO L225 Difference]: With dead ends: 1324 [2022-07-14 06:02:25,946 INFO L226 Difference]: Without dead ends: 1278 [2022-07-14 06:02:25,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=699, Invalid=7311, Unknown=0, NotChecked=0, Total=8010 [2022-07-14 06:02:25,949 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 867 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:25,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 1975 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2236 Invalid, 0 Unknown, 435 Unchecked, 1.1s Time] [2022-07-14 06:02:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-07-14 06:02:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 889. [2022-07-14 06:02:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 887 states have (on average 1.1071025930101466) internal successors, (982), 888 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 982 transitions. [2022-07-14 06:02:25,963 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 982 transitions. Word has length 76 [2022-07-14 06:02:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:25,964 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 982 transitions. [2022-07-14 06:02:25,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:25,964 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 982 transitions. [2022-07-14 06:02:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-14 06:02:25,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:25,966 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:25,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:26,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:26,192 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203680, now seen corresponding path program 7 times [2022-07-14 06:02:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:26,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733031645] [2022-07-14 06:02:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:26,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:26,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:26,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733031645] [2022-07-14 06:02:26,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733031645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:26,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849722966] [2022-07-14 06:02:26,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:02:26,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:26,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:26,843 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) [2022-07-14 06:02:26,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 06:02:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:02:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:27,226 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 [2022-07-14 06:02:27,521 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 [2022-07-14 06:02:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 86 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:27,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:27,665 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 [2022-07-14 06:02:27,667 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 [2022-07-14 06:02:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 86 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:27,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849722966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:27,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:27,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 36 [2022-07-14 06:02:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082785903] [2022-07-14 06:02:27,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:02:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:02:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:02:27,828 INFO L87 Difference]: Start difference. First operand 889 states and 982 transitions. Second operand has 36 states, 36 states have (on average 4.138888888888889) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:30,854 INFO L93 Difference]: Finished difference Result 1235 states and 1340 transitions. [2022-07-14 06:02:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-14 06:02:30,855 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.138888888888889) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-14 06:02:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:30,858 INFO L225 Difference]: With dead ends: 1235 [2022-07-14 06:02:30,858 INFO L226 Difference]: Without dead ends: 1153 [2022-07-14 06:02:30,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=605, Invalid=4945, Unknown=0, NotChecked=0, Total=5550 [2022-07-14 06:02:30,859 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 565 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:30,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1589 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1580 Invalid, 0 Unknown, 173 Unchecked, 0.8s Time] [2022-07-14 06:02:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-07-14 06:02:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 993. [2022-07-14 06:02:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 991 states have (on average 1.1039354187689203) internal successors, (1094), 992 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1094 transitions. [2022-07-14 06:02:30,894 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1094 transitions. Word has length 79 [2022-07-14 06:02:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:30,894 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1094 transitions. [2022-07-14 06:02:30,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.138888888888889) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1094 transitions. [2022-07-14 06:02:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-14 06:02:30,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:30,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:30,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:31,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:31,116 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2132340658, now seen corresponding path program 6 times [2022-07-14 06:02:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:31,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165940582] [2022-07-14 06:02:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:31,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:31,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:31,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165940582] [2022-07-14 06:02:31,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165940582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:31,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013422645] [2022-07-14 06:02:31,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:02:31,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:31,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:31,536 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) [2022-07-14 06:02:31,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 06:02:31,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 06:02:31,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:31,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-14 06:02:31,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:31,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:02:31,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:02:32,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:02:33,531 INFO L356 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2022-07-14 06:02:33,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 24 [2022-07-14 06:02:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:33,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:34,560 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_971 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_971) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_971 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (not (= .cse1 (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (= .cse1 0)))) is different from false [2022-07-14 06:02:34,567 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:34,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-07-14 06:02:34,584 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-14 06:02:34,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 73 [2022-07-14 06:02:34,603 INFO L356 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-07-14 06:02:34,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2022-07-14 06:02:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:35,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013422645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:35,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:35,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 26] total 68 [2022-07-14 06:02:35,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313295843] [2022-07-14 06:02:35,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:35,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-14 06:02:35,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-14 06:02:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4177, Unknown=1, NotChecked=130, Total=4556 [2022-07-14 06:02:35,089 INFO L87 Difference]: Start difference. First operand 993 states and 1094 transitions. Second operand has 68 states, 68 states have (on average 3.2794117647058822) internal successors, (223), 68 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:39,964 INFO L93 Difference]: Finished difference Result 1866 states and 2032 transitions. [2022-07-14 06:02:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-14 06:02:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.2794117647058822) internal successors, (223), 68 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-14 06:02:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:39,967 INFO L225 Difference]: With dead ends: 1866 [2022-07-14 06:02:39,967 INFO L226 Difference]: Without dead ends: 1794 [2022-07-14 06:02:39,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1005, Invalid=13760, Unknown=1, NotChecked=240, Total=15006 [2022-07-14 06:02:39,969 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 480 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2164 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:39,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 2034 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1495 Invalid, 0 Unknown, 2164 Unchecked, 0.7s Time] [2022-07-14 06:02:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-07-14 06:02:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1618. [2022-07-14 06:02:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1616 states have (on average 1.1045792079207921) internal successors, (1785), 1617 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 1785 transitions. [2022-07-14 06:02:39,987 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 1785 transitions. Word has length 80 [2022-07-14 06:02:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:39,987 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 1785 transitions. [2022-07-14 06:02:39,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.2794117647058822) internal successors, (223), 68 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 1785 transitions. [2022-07-14 06:02:39,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-14 06:02:39,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:39,990 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:40,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:40,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:40,207 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1938211421, now seen corresponding path program 8 times [2022-07-14 06:02:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37131107] [2022-07-14 06:02:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 6 proven. 114 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:40,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37131107] [2022-07-14 06:02:40,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37131107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443634380] [2022-07-14 06:02:40,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:02:40,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:40,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:40,401 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) [2022-07-14 06:02:40,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 06:02:40,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:02:40,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-14 06:02:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:40,560 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:02:40,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:02:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:40,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:02:41,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443634380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:41,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:41,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-07-14 06:02:41,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256637294] [2022-07-14 06:02:41,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:41,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-14 06:02:41,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-14 06:02:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:02:41,377 INFO L87 Difference]: Start difference. First operand 1618 states and 1785 transitions. Second operand has 40 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 40 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:42,049 INFO L93 Difference]: Finished difference Result 1943 states and 2109 transitions. [2022-07-14 06:02:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:02:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 40 states have internal predecessors, (207), 0 states have call successors, (0), 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 83 [2022-07-14 06:02:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:42,054 INFO L225 Difference]: With dead ends: 1943 [2022-07-14 06:02:42,054 INFO L226 Difference]: Without dead ends: 1870 [2022-07-14 06:02:42,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:02:42,055 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 667 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:42,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 690 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:02:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-07-14 06:02:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1383. [2022-07-14 06:02:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1381 states have (on average 1.1049963794351918) internal successors, (1526), 1382 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1526 transitions. [2022-07-14 06:02:42,072 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1526 transitions. Word has length 83 [2022-07-14 06:02:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:42,072 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 1526 transitions. [2022-07-14 06:02:42,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 40 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1526 transitions. [2022-07-14 06:02:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-14 06:02:42,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:42,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:42,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:42,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-14 06:02:42,296 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1003116751, now seen corresponding path program 7 times [2022-07-14 06:02:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:42,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720063409] [2022-07-14 06:02:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:42,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:42,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720063409] [2022-07-14 06:02:42,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720063409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:42,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28414027] [2022-07-14 06:02:42,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:02:42,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:42,454 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) [2022-07-14 06:02:42,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 06:02:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:42,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:02:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:42,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:43,061 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 [2022-07-14 06:02:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:43,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28414027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:43,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:43,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2022-07-14 06:02:43,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312327336] [2022-07-14 06:02:43,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:43,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 06:02:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 06:02:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:02:43,094 INFO L87 Difference]: Start difference. First operand 1383 states and 1526 transitions. Second operand has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:43,584 INFO L93 Difference]: Finished difference Result 1807 states and 1985 transitions. [2022-07-14 06:02:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:02:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 states have internal predecessors, (180), 0 states have call successors, (0), 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 [2022-07-14 06:02:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:43,588 INFO L225 Difference]: With dead ends: 1807 [2022-07-14 06:02:43,588 INFO L226 Difference]: Without dead ends: 1807 [2022-07-14 06:02:43,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:02:43,589 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 432 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:43,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 862 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:02:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-07-14 06:02:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1515. [2022-07-14 06:02:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1513 states have (on average 1.1044282881692002) internal successors, (1671), 1514 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1671 transitions. [2022-07-14 06:02:43,604 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1671 transitions. Word has length 84 [2022-07-14 06:02:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:43,604 INFO L495 AbstractCegarLoop]: Abstraction has 1515 states and 1671 transitions. [2022-07-14 06:02:43,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1671 transitions. [2022-07-14 06:02:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-14 06:02:43,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:43,606 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:43,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-14 06:02:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-14 06:02:43,830 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 9 times [2022-07-14 06:02:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:43,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426621798] [2022-07-14 06:02:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:44,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426621798] [2022-07-14 06:02:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426621798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526376388] [2022-07-14 06:02:44,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:02:44,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:44,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:44,307 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) [2022-07-14 06:02:44,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 06:02:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:02:44,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:44,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:02:44,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:44,790 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 [2022-07-14 06:02:44,969 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 [2022-07-14 06:02:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:44,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:45,077 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 [2022-07-14 06:02:45,079 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 [2022-07-14 06:02:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:45,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526376388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:45,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:45,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 40 [2022-07-14 06:02:45,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470160903] [2022-07-14 06:02:45,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:45,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-14 06:02:45,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-14 06:02:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:02:45,221 INFO L87 Difference]: Start difference. First operand 1515 states and 1671 transitions. Second operand has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:46,528 INFO L93 Difference]: Finished difference Result 2651 states and 2903 transitions. [2022-07-14 06:02:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:02:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-07-14 06:02:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:46,533 INFO L225 Difference]: With dead ends: 2651 [2022-07-14 06:02:46,533 INFO L226 Difference]: Without dead ends: 2584 [2022-07-14 06:02:46,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=3016, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:02:46,534 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 719 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:46,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 2766 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2253 Invalid, 0 Unknown, 73 Unchecked, 0.8s Time] [2022-07-14 06:02:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-07-14 06:02:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1996. [2022-07-14 06:02:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1994 states have (on average 1.1078234704112337) internal successors, (2209), 1995 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2209 transitions. [2022-07-14 06:02:46,557 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2209 transitions. Word has length 86 [2022-07-14 06:02:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:46,557 INFO L495 AbstractCegarLoop]: Abstraction has 1996 states and 2209 transitions. [2022-07-14 06:02:46,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2209 transitions. [2022-07-14 06:02:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-14 06:02:46,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:46,560 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:46,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:46,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-14 06:02:46,761 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:46,761 INFO L85 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 10 times [2022-07-14 06:02:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:46,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886143262] [2022-07-14 06:02:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:46,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:47,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886143262] [2022-07-14 06:02:47,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886143262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:47,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25504247] [2022-07-14 06:02:47,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:02:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:47,052 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) [2022-07-14 06:02:47,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 06:02:47,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:02:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-14 06:02:47,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:47,193 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:02:47,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:02:47,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:02:47,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:47,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:02:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 72 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:47,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:48,633 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 [2022-07-14 06:02:48,638 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 [2022-07-14 06:02:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:02:49,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25504247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:49,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:49,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 59 [2022-07-14 06:02:49,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484274467] [2022-07-14 06:02:49,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:49,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-14 06:02:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-14 06:02:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3158, Unknown=0, NotChecked=0, Total=3540 [2022-07-14 06:02:49,708 INFO L87 Difference]: Start difference. First operand 1996 states and 2209 transitions. Second operand has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:54,057 INFO L93 Difference]: Finished difference Result 3208 states and 3492 transitions. [2022-07-14 06:02:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-14 06:02:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-14 06:02:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:54,066 INFO L225 Difference]: With dead ends: 3208 [2022-07-14 06:02:54,066 INFO L226 Difference]: Without dead ends: 3096 [2022-07-14 06:02:54,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1807, Invalid=7505, Unknown=0, NotChecked=0, Total=9312 [2022-07-14 06:02:54,067 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1472 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 3885 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:54,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 2453 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3885 Invalid, 0 Unknown, 126 Unchecked, 2.0s Time] [2022-07-14 06:02:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2022-07-14 06:02:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2366. [2022-07-14 06:02:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2364 states have (on average 1.1150592216582065) internal successors, (2636), 2365 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 2636 transitions. [2022-07-14 06:02:54,094 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 2636 transitions. Word has length 90 [2022-07-14 06:02:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:54,094 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 2636 transitions. [2022-07-14 06:02:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 2636 transitions. [2022-07-14 06:02:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-14 06:02:54,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:54,114 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:54,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:54,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:54,330 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash 318466939, now seen corresponding path program 2 times [2022-07-14 06:02:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:54,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835628804] [2022-07-14 06:02:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:02:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:54,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835628804] [2022-07-14 06:02:54,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835628804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:54,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336288731] [2022-07-14 06:02:54,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:02:54,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:54,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:54,866 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) [2022-07-14 06:02:54,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 06:02:55,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:02:55,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:55,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:02:55,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:55,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:02:55,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:02:55,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:02:55,536 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 [2022-07-14 06:02:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:02:55,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:55,674 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1198 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1198) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:02:55,679 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:55,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:02:55,684 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:02:55,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:02:55,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:02:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:02:55,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336288731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:55,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:55,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 34 [2022-07-14 06:02:55,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896345138] [2022-07-14 06:02:55,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:55,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:02:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:02:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=958, Unknown=1, NotChecked=62, Total=1122 [2022-07-14 06:02:55,923 INFO L87 Difference]: Start difference. First operand 2366 states and 2636 transitions. Second operand has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:57,209 INFO L93 Difference]: Finished difference Result 2252 states and 2495 transitions. [2022-07-14 06:02:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:02:57,210 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-14 06:02:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:57,231 INFO L225 Difference]: With dead ends: 2252 [2022-07-14 06:02:57,231 INFO L226 Difference]: Without dead ends: 1838 [2022-07-14 06:02:57,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=317, Invalid=2656, Unknown=1, NotChecked=106, Total=3080 [2022-07-14 06:02:57,234 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 246 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:57,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 882 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 961 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-07-14 06:02:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2022-07-14 06:02:57,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1667. [2022-07-14 06:02:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.1177177177177178) internal successors, (1861), 1666 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 1861 transitions. [2022-07-14 06:02:57,279 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 1861 transitions. Word has length 90 [2022-07-14 06:02:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:57,279 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 1861 transitions. [2022-07-14 06:02:57,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 1861 transitions. [2022-07-14 06:02:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-14 06:02:57,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:57,282 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:57,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:02:57,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-14 06:02:57,505 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:02:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:02:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash 422434722, now seen corresponding path program 9 times [2022-07-14 06:02:57,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:02:57,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777781431] [2022-07-14 06:02:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:02:57,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:02:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:02:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:57,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:02:57,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777781431] [2022-07-14 06:02:57,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777781431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:02:57,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039208445] [2022-07-14 06:02:57,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:02:57,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:02:57,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:02:57,806 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:02:57,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 06:02:58,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-14 06:02:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:02:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:02:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:02:58,200 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 [2022-07-14 06:02:58,449 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 [2022-07-14 06:02:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:58,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:02:58,581 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 [2022-07-14 06:02:58,583 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 [2022-07-14 06:02:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:02:58,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039208445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:02:58,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:02:58,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 37 [2022-07-14 06:02:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335921163] [2022-07-14 06:02:58,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:02:58,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 06:02:58,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:02:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 06:02:58,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:02:58,756 INFO L87 Difference]: Start difference. First operand 1667 states and 1861 transitions. Second operand has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:02:59,868 INFO L93 Difference]: Finished difference Result 1825 states and 1998 transitions. [2022-07-14 06:02:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:02:59,869 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-14 06:02:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:02:59,877 INFO L225 Difference]: With dead ends: 1825 [2022-07-14 06:02:59,877 INFO L226 Difference]: Without dead ends: 1619 [2022-07-14 06:02:59,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:02:59,878 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 603 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:02:59,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1800 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1388 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2022-07-14 06:02:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-07-14 06:02:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1514. [2022-07-14 06:02:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1512 states have (on average 1.1104497354497354) internal successors, (1679), 1513 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1679 transitions. [2022-07-14 06:02:59,898 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1679 transitions. Word has length 93 [2022-07-14 06:02:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:02:59,900 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 1679 transitions. [2022-07-14 06:02:59,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:02:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1679 transitions. [2022-07-14 06:02:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-14 06:02:59,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:02:59,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:02:59,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-14 06:03:00,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-14 06:03:00,121 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:00,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1725290594, now seen corresponding path program 8 times [2022-07-14 06:03:00,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:00,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714130296] [2022-07-14 06:03:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:00,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714130296] [2022-07-14 06:03:00,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714130296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058328250] [2022-07-14 06:03:00,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:03:00,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:00,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:00,668 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:00,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-14 06:03:00,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:03:00,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:03:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:00,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:03:01,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:03:01,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:03:01,503 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 [2022-07-14 06:03:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:01,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:01,671 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1289) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:03:01,675 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:01,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:03:01,681 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:01,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:03:01,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:03:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:01,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058328250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:01,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:01,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 44 [2022-07-14 06:03:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848840612] [2022-07-14 06:03:01,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:01,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:03:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:03:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1691, Unknown=1, NotChecked=82, Total=1892 [2022-07-14 06:03:01,960 INFO L87 Difference]: Start difference. First operand 1514 states and 1679 transitions. Second operand has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:03,431 INFO L93 Difference]: Finished difference Result 2976 states and 3280 transitions. [2022-07-14 06:03:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:03:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-14 06:03:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:03,436 INFO L225 Difference]: With dead ends: 2976 [2022-07-14 06:03:03,436 INFO L226 Difference]: Without dead ends: 1929 [2022-07-14 06:03:03,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=315, Invalid=3848, Unknown=1, NotChecked=126, Total=4290 [2022-07-14 06:03:03,436 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 209 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:03,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1581 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1739 Invalid, 0 Unknown, 124 Unchecked, 0.8s Time] [2022-07-14 06:03:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-07-14 06:03:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1613. [2022-07-14 06:03:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.1111111111111112) internal successors, (1790), 1612 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 1790 transitions. [2022-07-14 06:03:03,466 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 1790 transitions. Word has length 97 [2022-07-14 06:03:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:03,467 INFO L495 AbstractCegarLoop]: Abstraction has 1613 states and 1790 transitions. [2022-07-14 06:03:03,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 1790 transitions. [2022-07-14 06:03:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-14 06:03:03,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:03,469 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:03,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:03,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-14 06:03:03,684 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash -824280031, now seen corresponding path program 9 times [2022-07-14 06:03:03,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:03,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939378712] [2022-07-14 06:03:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:03,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:03,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:03,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939378712] [2022-07-14 06:03:03,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939378712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:03,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704706675] [2022-07-14 06:03:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:03:03,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:03,960 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:03,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-14 06:03:04,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:03:04,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:04,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 06:03:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:04,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:05,298 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 [2022-07-14 06:03:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:05,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704706675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:05,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:05,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-07-14 06:03:05,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645074477] [2022-07-14 06:03:05,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:05,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 06:03:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 06:03:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:03:05,541 INFO L87 Difference]: Start difference. First operand 1613 states and 1790 transitions. Second operand has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:06,482 INFO L93 Difference]: Finished difference Result 2439 states and 2689 transitions. [2022-07-14 06:03:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:03:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-14 06:03:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:06,487 INFO L225 Difference]: With dead ends: 2439 [2022-07-14 06:03:06,487 INFO L226 Difference]: Without dead ends: 2439 [2022-07-14 06:03:06,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=566, Invalid=2190, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:03:06,488 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 835 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:06,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 970 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:03:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-07-14 06:03:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1843. [2022-07-14 06:03:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1841 states have (on average 1.1108093427485062) internal successors, (2045), 1842 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2045 transitions. [2022-07-14 06:03:06,510 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2045 transitions. Word has length 101 [2022-07-14 06:03:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:06,510 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2045 transitions. [2022-07-14 06:03:06,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2045 transitions. [2022-07-14 06:03:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-14 06:03:06,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:06,513 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:06,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-14 06:03:06,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:06,735 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1695966432, now seen corresponding path program 11 times [2022-07-14 06:03:06,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:06,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769443957] [2022-07-14 06:03:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 182 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:07,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769443957] [2022-07-14 06:03:07,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769443957] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:07,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329977588] [2022-07-14 06:03:07,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:03:07,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:07,096 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:07,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-14 06:03:07,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 06:03:07,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:03:07,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:07,378 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:03:07,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:03:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:08,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:08,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329977588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:08,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:08,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 54 [2022-07-14 06:03:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375700102] [2022-07-14 06:03:08,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-14 06:03:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-14 06:03:08,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2419, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:03:08,525 INFO L87 Difference]: Start difference. First operand 1843 states and 2045 transitions. Second operand has 54 states, 54 states have (on average 4.5) internal successors, (243), 54 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:10,661 INFO L93 Difference]: Finished difference Result 3229 states and 3492 transitions. [2022-07-14 06:03:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-14 06:03:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.5) internal successors, (243), 54 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-14 06:03:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:10,665 INFO L225 Difference]: With dead ends: 3229 [2022-07-14 06:03:10,665 INFO L226 Difference]: Without dead ends: 2879 [2022-07-14 06:03:10,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2479, Invalid=8651, Unknown=0, NotChecked=0, Total=11130 [2022-07-14 06:03:10,666 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1273 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:10,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 1258 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 06:03:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-07-14 06:03:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2197. [2022-07-14 06:03:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2195 states have (on average 1.1129840546697038) internal successors, (2443), 2196 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 2443 transitions. [2022-07-14 06:03:10,687 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 2443 transitions. Word has length 102 [2022-07-14 06:03:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:10,687 INFO L495 AbstractCegarLoop]: Abstraction has 2197 states and 2443 transitions. [2022-07-14 06:03:10,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.5) internal successors, (243), 54 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 2443 transitions. [2022-07-14 06:03:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-14 06:03:10,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:10,690 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:10,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:10,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-14 06:03:10,913 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:10,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:10,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1737904387, now seen corresponding path program 12 times [2022-07-14 06:03:10,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:10,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179989664] [2022-07-14 06:03:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:10,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:11,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179989664] [2022-07-14 06:03:11,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179989664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:11,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088383035] [2022-07-14 06:03:11,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:03:11,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:11,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:11,249 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:11,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-14 06:03:11,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-14 06:03:11,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:11,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 06:03:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:11,681 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 [2022-07-14 06:03:11,889 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 [2022-07-14 06:03:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:11,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:12,017 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 [2022-07-14 06:03:12,018 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 [2022-07-14 06:03:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:12,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088383035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:12,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:12,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 46 [2022-07-14 06:03:12,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218231974] [2022-07-14 06:03:12,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:12,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:03:12,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:03:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:03:12,213 INFO L87 Difference]: Start difference. First operand 2197 states and 2443 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:13,944 INFO L93 Difference]: Finished difference Result 3646 states and 4022 transitions. [2022-07-14 06:03:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:03:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-14 06:03:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:13,949 INFO L225 Difference]: With dead ends: 3646 [2022-07-14 06:03:13,949 INFO L226 Difference]: Without dead ends: 3556 [2022-07-14 06:03:13,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 186 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=436, Invalid=4256, Unknown=0, NotChecked=0, Total=4692 [2022-07-14 06:03:13,950 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 689 mSDsluCounter, 4139 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 4336 SdHoareTripleChecker+Invalid, 3340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:13,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 4336 Invalid, 3340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3050 Invalid, 0 Unknown, 253 Unchecked, 1.1s Time] [2022-07-14 06:03:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2022-07-14 06:03:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2722. [2022-07-14 06:03:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2720 states have (on average 1.1158088235294117) internal successors, (3035), 2721 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 3035 transitions. [2022-07-14 06:03:13,977 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 3035 transitions. Word has length 106 [2022-07-14 06:03:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:13,977 INFO L495 AbstractCegarLoop]: Abstraction has 2722 states and 3035 transitions. [2022-07-14 06:03:13,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 3035 transitions. [2022-07-14 06:03:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-14 06:03:13,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:13,980 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:14,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:14,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:14,194 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash -23027046, now seen corresponding path program 13 times [2022-07-14 06:03:14,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:14,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147797514] [2022-07-14 06:03:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:14,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:14,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147797514] [2022-07-14 06:03:14,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147797514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192358406] [2022-07-14 06:03:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:03:14,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:14,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:14,540 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:14,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-14 06:03:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 06:03:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:15,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:03:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:15,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192358406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:15,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:15,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 50 [2022-07-14 06:03:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369665298] [2022-07-14 06:03:15,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:15,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:03:15,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:03:15,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:03:15,702 INFO L87 Difference]: Start difference. First operand 2722 states and 3035 transitions. Second operand has 51 states, 50 states have (on average 4.56) internal successors, (228), 51 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:18,385 INFO L93 Difference]: Finished difference Result 3801 states and 4195 transitions. [2022-07-14 06:03:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:03:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.56) internal successors, (228), 51 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-14 06:03:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:18,392 INFO L225 Difference]: With dead ends: 3801 [2022-07-14 06:03:18,392 INFO L226 Difference]: Without dead ends: 3801 [2022-07-14 06:03:18,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1194, Invalid=5126, Unknown=0, NotChecked=0, Total=6320 [2022-07-14 06:03:18,393 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1172 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:18,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 2323 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3532 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-14 06:03:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2022-07-14 06:03:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3227. [2022-07-14 06:03:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3225 states have (on average 1.1224806201550388) internal successors, (3620), 3226 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 3620 transitions. [2022-07-14 06:03:18,429 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 3620 transitions. Word has length 110 [2022-07-14 06:03:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:18,430 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 3620 transitions. [2022-07-14 06:03:18,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.56) internal successors, (228), 51 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 3620 transitions. [2022-07-14 06:03:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-14 06:03:18,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:18,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:18,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-14 06:03:18,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-14 06:03:18,658 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1378974092, now seen corresponding path program 10 times [2022-07-14 06:03:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:18,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50201278] [2022-07-14 06:03:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:18,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:19,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:19,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50201278] [2022-07-14 06:03:19,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50201278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:19,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221062861] [2022-07-14 06:03:19,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:03:19,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:19,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:19,388 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:19,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 06:03:19,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:03:19,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-14 06:03:19,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:19,662 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:03:19,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:03:19,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:03:20,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:03:20,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:03:22,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:03:23,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:03:23,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 17 [2022-07-14 06:03:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 98 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:23,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:24,905 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:24,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2022-07-14 06:03:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:24,919 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:24,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 92 [2022-07-14 06:03:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:24,934 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:24,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2022-07-14 06:03:28,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:28,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:03:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 148 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:28,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221062861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:28,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:28,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 73 [2022-07-14 06:03:28,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358475401] [2022-07-14 06:03:28,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:28,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-14 06:03:28,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-14 06:03:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=4882, Unknown=12, NotChecked=0, Total=5256 [2022-07-14 06:03:28,856 INFO L87 Difference]: Start difference. First operand 3227 states and 3620 transitions. Second operand has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:34,259 INFO L93 Difference]: Finished difference Result 4043 states and 4483 transitions. [2022-07-14 06:03:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-14 06:03:34,260 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 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 [2022-07-14 06:03:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:34,279 INFO L225 Difference]: With dead ends: 4043 [2022-07-14 06:03:34,280 INFO L226 Difference]: Without dead ends: 3933 [2022-07-14 06:03:34,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4439 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1577, Invalid=19003, Unknown=12, NotChecked=0, Total=20592 [2022-07-14 06:03:34,281 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 224 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:34,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 2139 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 873 Invalid, 0 Unknown, 293 Unchecked, 0.4s Time] [2022-07-14 06:03:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2022-07-14 06:03:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3789. [2022-07-14 06:03:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3787 states have (on average 1.1151307103247954) internal successors, (4223), 3788 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 4223 transitions. [2022-07-14 06:03:34,320 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 4223 transitions. Word has length 114 [2022-07-14 06:03:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:34,320 INFO L495 AbstractCegarLoop]: Abstraction has 3789 states and 4223 transitions. [2022-07-14 06:03:34,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 4223 transitions. [2022-07-14 06:03:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-14 06:03:34,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:34,324 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:34,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:34,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:34,539 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash 772743854, now seen corresponding path program 14 times [2022-07-14 06:03:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:34,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847939705] [2022-07-14 06:03:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847939705] [2022-07-14 06:03:35,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847939705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126283915] [2022-07-14 06:03:35,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:03:35,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:35,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:35,028 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:35,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-14 06:03:35,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:03:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:03:35,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:35,225 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:03:35,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:03:35,715 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 [2022-07-14 06:03:36,957 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:36,957 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 [2022-07-14 06:03:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:37,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:38,383 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 [2022-07-14 06:03:38,385 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 [2022-07-14 06:03:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 153 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:39,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126283915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:39,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:39,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2022-07-14 06:03:39,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261364271] [2022-07-14 06:03:39,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-14 06:03:39,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-14 06:03:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=6662, Unknown=0, NotChecked=0, Total=7140 [2022-07-14 06:03:39,666 INFO L87 Difference]: Start difference. First operand 3789 states and 4223 transitions. Second operand has 85 states, 85 states have (on average 4.0) internal successors, (340), 85 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:45,036 INFO L93 Difference]: Finished difference Result 4593 states and 5083 transitions. [2022-07-14 06:03:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-14 06:03:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.0) internal successors, (340), 85 states have internal predecessors, (340), 0 states have call successors, (0), 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 116 [2022-07-14 06:03:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:45,043 INFO L225 Difference]: With dead ends: 4593 [2022-07-14 06:03:45,044 INFO L226 Difference]: Without dead ends: 4517 [2022-07-14 06:03:45,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1329, Invalid=15441, Unknown=0, NotChecked=0, Total=16770 [2022-07-14 06:03:45,046 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 1662 mSDsluCounter, 5096 mSDsCounter, 0 mSdLazyCounter, 5819 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 5240 SdHoareTripleChecker+Invalid, 6789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 5819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:45,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1662 Valid, 5240 Invalid, 6789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 5819 Invalid, 0 Unknown, 858 Unchecked, 2.4s Time] [2022-07-14 06:03:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2022-07-14 06:03:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4112. [2022-07-14 06:03:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4112 states, 4110 states have (on average 1.1163017031630171) internal successors, (4588), 4111 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 4588 transitions. [2022-07-14 06:03:45,088 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 4588 transitions. Word has length 116 [2022-07-14 06:03:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:45,088 INFO L495 AbstractCegarLoop]: Abstraction has 4112 states and 4588 transitions. [2022-07-14 06:03:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.0) internal successors, (340), 85 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 4588 transitions. [2022-07-14 06:03:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-14 06:03:45,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:45,092 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:45,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:45,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-14 06:03:45,320 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash 802577257, now seen corresponding path program 11 times [2022-07-14 06:03:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742732146] [2022-07-14 06:03:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:45,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742732146] [2022-07-14 06:03:45,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742732146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:45,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186897038] [2022-07-14 06:03:45,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:03:45,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:45,540 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:45,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-14 06:03:45,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-14 06:03:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:45,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:03:45,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:46,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:46,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-14 06:03:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:03:46,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186897038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:46,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:46,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-14 06:03:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515430210] [2022-07-14 06:03:46,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:46,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:03:46,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:03:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:03:46,618 INFO L87 Difference]: Start difference. First operand 4112 states and 4588 transitions. Second operand has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:47,508 INFO L93 Difference]: Finished difference Result 7736 states and 8651 transitions. [2022-07-14 06:03:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:03:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 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 118 [2022-07-14 06:03:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:47,518 INFO L225 Difference]: With dead ends: 7736 [2022-07-14 06:03:47,519 INFO L226 Difference]: Without dead ends: 7736 [2022-07-14 06:03:47,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 06:03:47,521 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1044 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:47,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 1326 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:03:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2022-07-14 06:03:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 4568. [2022-07-14 06:03:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4566 states have (on average 1.1171703898379326) internal successors, (5101), 4567 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 5101 transitions. [2022-07-14 06:03:47,584 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 5101 transitions. Word has length 118 [2022-07-14 06:03:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:47,584 INFO L495 AbstractCegarLoop]: Abstraction has 4568 states and 5101 transitions. [2022-07-14 06:03:47,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 5101 transitions. [2022-07-14 06:03:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-14 06:03:47,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:47,590 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:47,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:47,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-14 06:03:47,814 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1389650563, now seen corresponding path program 3 times [2022-07-14 06:03:47,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:47,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811899268] [2022-07-14 06:03:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:47,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:03:48,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:48,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811899268] [2022-07-14 06:03:48,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811899268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:48,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470830633] [2022-07-14 06:03:48,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:03:48,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:48,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:48,365 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:48,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-14 06:03:48,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-14 06:03:48,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-14 06:03:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:48,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:03:49,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:03:50,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:03:51,286 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-14 06:03:51,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2022-07-14 06:03:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:03:51,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:03:52,277 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (v_ArrVal_1705 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1705))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= .cse1 0))))) is different from false [2022-07-14 06:03:52,282 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:52,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-14 06:03:52,296 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:52,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-14 06:03:52,308 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:03:52,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-14 06:03:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:03:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470830633] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:03:52,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:03:52,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 63 [2022-07-14 06:03:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631344172] [2022-07-14 06:03:52,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:03:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-14 06:03:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-14 06:03:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3607, Unknown=1, NotChecked=120, Total=3906 [2022-07-14 06:03:52,650 INFO L87 Difference]: Start difference. First operand 4568 states and 5101 transitions. Second operand has 63 states, 63 states have (on average 4.841269841269841) internal successors, (305), 63 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:54,399 INFO L93 Difference]: Finished difference Result 8039 states and 9001 transitions. [2022-07-14 06:03:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:03:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.841269841269841) internal successors, (305), 63 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-07-14 06:03:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:54,406 INFO L225 Difference]: With dead ends: 8039 [2022-07-14 06:03:54,406 INFO L226 Difference]: Without dead ends: 8023 [2022-07-14 06:03:54,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 211 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=422, Invalid=7063, Unknown=1, NotChecked=170, Total=7656 [2022-07-14 06:03:54,407 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 213 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2070 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:54,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2523 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1158 Invalid, 0 Unknown, 2070 Unchecked, 0.5s Time] [2022-07-14 06:03:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2022-07-14 06:03:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 6047. [2022-07-14 06:03:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6047 states, 6045 states have (on average 1.1181141439205955) internal successors, (6759), 6046 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6047 states to 6047 states and 6759 transitions. [2022-07-14 06:03:54,457 INFO L78 Accepts]: Start accepts. Automaton has 6047 states and 6759 transitions. Word has length 124 [2022-07-14 06:03:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:03:54,458 INFO L495 AbstractCegarLoop]: Abstraction has 6047 states and 6759 transitions. [2022-07-14 06:03:54,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.841269841269841) internal successors, (305), 63 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6047 states and 6759 transitions. [2022-07-14 06:03:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-14 06:03:54,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:54,465 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:54,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:03:54,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-14 06:03:54,677 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:03:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1206397821, now seen corresponding path program 4 times [2022-07-14 06:03:54,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:54,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114532287] [2022-07-14 06:03:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:54,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 271 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:03:55,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:55,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114532287] [2022-07-14 06:03:55,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114532287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:03:55,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311666536] [2022-07-14 06:03:55,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:03:55,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:03:55,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:55,774 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:03:55,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-14 06:03:55,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:03:55,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:03:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:03:55,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:03:55,964 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:03:55,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:03:56,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:03:56,872 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:03:56,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-14 06:03:56,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:04:07,029 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:04:07,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2022-07-14 06:04:07,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:07,597 INFO L356 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2022-07-14 06:04:07,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2022-07-14 06:04:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 170 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:04:07,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:09,216 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:09,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:04:09,232 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:09,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-14 06:04:09,240 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:09,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:04:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 161 proven. 121 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:04:11,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311666536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:11,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:11,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 29, 29] total 90 [2022-07-14 06:04:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549117090] [2022-07-14 06:04:11,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-14 06:04:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-14 06:04:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=7596, Unknown=12, NotChecked=0, Total=8010 [2022-07-14 06:04:11,099 INFO L87 Difference]: Start difference. First operand 6047 states and 6759 transitions. Second operand has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 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) [2022-07-14 06:04:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:21,838 INFO L93 Difference]: Finished difference Result 7646 states and 8475 transitions. [2022-07-14 06:04:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-07-14 06:04:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 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 124 [2022-07-14 06:04:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:21,843 INFO L225 Difference]: With dead ends: 7646 [2022-07-14 06:04:21,844 INFO L226 Difference]: Without dead ends: 7630 [2022-07-14 06:04:21,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 213 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10901 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2061, Invalid=39339, Unknown=12, NotChecked=0, Total=41412 [2022-07-14 06:04:21,845 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 579 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 915 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:21,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 2292 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1897 Invalid, 0 Unknown, 915 Unchecked, 1.1s Time] [2022-07-14 06:04:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2022-07-14 06:04:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 7159. [2022-07-14 06:04:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7159 states, 7157 states have (on average 1.11373480508593) internal successors, (7971), 7158 states have internal predecessors, (7971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7159 states to 7159 states and 7971 transitions. [2022-07-14 06:04:21,899 INFO L78 Accepts]: Start accepts. Automaton has 7159 states and 7971 transitions. Word has length 124 [2022-07-14 06:04:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:21,899 INFO L495 AbstractCegarLoop]: Abstraction has 7159 states and 7971 transitions. [2022-07-14 06:04:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 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) [2022-07-14 06:04:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7159 states and 7971 transitions. [2022-07-14 06:04:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-14 06:04:21,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:21,907 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:21,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:22,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-14 06:04:22,126 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:04:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:22,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1028104865, now seen corresponding path program 15 times [2022-07-14 06:04:22,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:22,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791779759] [2022-07-14 06:04:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:22,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:22,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791779759] [2022-07-14 06:04:22,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791779759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:22,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396471159] [2022-07-14 06:04:22,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:04:22,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:22,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:22,593 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:22,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-14 06:04:22,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-14 06:04:22,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-14 06:04:22,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:23,361 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 [2022-07-14 06:04:23,613 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 7 [2022-07-14 06:04:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:23,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:23,769 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 [2022-07-14 06:04:23,770 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 [2022-07-14 06:04:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:24,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396471159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:24,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:24,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 52 [2022-07-14 06:04:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016518891] [2022-07-14 06:04:24,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:24,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:04:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:04:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2498, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:04:24,037 INFO L87 Difference]: Start difference. First operand 7159 states and 7971 transitions. Second operand has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:26,919 INFO L93 Difference]: Finished difference Result 10316 states and 11437 transitions. [2022-07-14 06:04:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-14 06:04:26,919 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 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 126 [2022-07-14 06:04:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:26,928 INFO L225 Difference]: With dead ends: 10316 [2022-07-14 06:04:26,929 INFO L226 Difference]: Without dead ends: 10213 [2022-07-14 06:04:26,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=5616, Unknown=0, NotChecked=0, Total=6162 [2022-07-14 06:04:26,930 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 1144 mSDsluCounter, 6440 mSDsCounter, 0 mSdLazyCounter, 5240 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 5314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 5240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:26,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 6678 Invalid, 5314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 5240 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-14 06:04:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10213 states. [2022-07-14 06:04:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10213 to 8498. [2022-07-14 06:04:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8498 states, 8496 states have (on average 1.1166431261770244) internal successors, (9487), 8497 states have internal predecessors, (9487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8498 states to 8498 states and 9487 transitions. [2022-07-14 06:04:27,005 INFO L78 Accepts]: Start accepts. Automaton has 8498 states and 9487 transitions. Word has length 126 [2022-07-14 06:04:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,005 INFO L495 AbstractCegarLoop]: Abstraction has 8498 states and 9487 transitions. [2022-07-14 06:04:27,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 8498 states and 9487 transitions. [2022-07-14 06:04:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-14 06:04:27,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,015 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:27,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-14 06:04:27,227 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:04:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash -589496237, now seen corresponding path program 10 times [2022-07-14 06:04:27,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:27,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581070920] [2022-07-14 06:04:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 41 proven. 416 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:04:27,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:27,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581070920] [2022-07-14 06:04:27,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581070920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:27,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448540605] [2022-07-14 06:04:27,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:04:27,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:27,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:27,755 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:27,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-14 06:04:27,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:04:27,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-14 06:04:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:27,961 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:27,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:04:28,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:04:29,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:29,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:04:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 217 proven. 240 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:04:29,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:30,401 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 [2022-07-14 06:04:30,406 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 [2022-07-14 06:04:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 202 proven. 255 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:04:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448540605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:31,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 73 [2022-07-14 06:04:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648878298] [2022-07-14 06:04:31,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:31,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-14 06:04:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-14 06:04:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4799, Unknown=0, NotChecked=0, Total=5256 [2022-07-14 06:04:31,344 INFO L87 Difference]: Start difference. First operand 8498 states and 9487 transitions. Second operand has 73 states, 73 states have (on average 4.616438356164384) internal successors, (337), 73 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:34,089 INFO L93 Difference]: Finished difference Result 8854 states and 9809 transitions. [2022-07-14 06:04:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-14 06:04:34,090 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.616438356164384) internal successors, (337), 73 states have internal predecessors, (337), 0 states have call successors, (0), 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 129 [2022-07-14 06:04:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:34,097 INFO L225 Difference]: With dead ends: 8854 [2022-07-14 06:04:34,097 INFO L226 Difference]: Without dead ends: 8462 [2022-07-14 06:04:34,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1505, Invalid=13015, Unknown=0, NotChecked=0, Total=14520 [2022-07-14 06:04:34,099 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 276 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:34,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1956 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1382 Invalid, 0 Unknown, 446 Unchecked, 0.5s Time] [2022-07-14 06:04:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8462 states. [2022-07-14 06:04:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8462 to 6941. [2022-07-14 06:04:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6939 states have (on average 1.111543450064851) internal successors, (7713), 6940 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 7713 transitions. [2022-07-14 06:04:34,163 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 7713 transitions. Word has length 129 [2022-07-14 06:04:34,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:34,163 INFO L495 AbstractCegarLoop]: Abstraction has 6941 states and 7713 transitions. [2022-07-14 06:04:34,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.616438356164384) internal successors, (337), 73 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 7713 transitions. [2022-07-14 06:04:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-14 06:04:34,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:34,171 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:34,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:34,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:34,371 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:04:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -590978948, now seen corresponding path program 16 times [2022-07-14 06:04:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056120132] [2022-07-14 06:04:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:34,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056120132] [2022-07-14 06:04:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056120132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730271993] [2022-07-14 06:04:34,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:04:34,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:34,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:34,838 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:34,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-14 06:04:35,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:04:35,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:35,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-14 06:04:35,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:35,049 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:35,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:04:35,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:04:36,509 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:36,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:04:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 200 proven. 372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:36,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:38,102 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 [2022-07-14 06:04:38,105 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 [2022-07-14 06:04:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:39,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730271993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:39,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:39,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32, 32] total 89 [2022-07-14 06:04:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255607960] [2022-07-14 06:04:39,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:39,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-14 06:04:39,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-14 06:04:39,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=7237, Unknown=0, NotChecked=0, Total=8010 [2022-07-14 06:04:39,940 INFO L87 Difference]: Start difference. First operand 6941 states and 7713 transitions. Second operand has 90 states, 89 states have (on average 4.292134831460674) internal successors, (382), 90 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:45,848 INFO L93 Difference]: Finished difference Result 9538 states and 10565 transitions. [2022-07-14 06:04:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-14 06:04:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.292134831460674) internal successors, (382), 90 states have internal predecessors, (382), 0 states have call successors, (0), 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 130 [2022-07-14 06:04:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:45,855 INFO L225 Difference]: With dead ends: 9538 [2022-07-14 06:04:45,855 INFO L226 Difference]: Without dead ends: 9538 [2022-07-14 06:04:45,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3880, Invalid=16712, Unknown=0, NotChecked=0, Total=20592 [2022-07-14 06:04:45,856 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1495 mSDsluCounter, 4602 mSDsCounter, 0 mSdLazyCounter, 6680 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 4791 SdHoareTripleChecker+Invalid, 7014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 6680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:45,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1495 Valid, 4791 Invalid, 7014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 6680 Invalid, 0 Unknown, 226 Unchecked, 2.9s Time] [2022-07-14 06:04:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9538 states. [2022-07-14 06:04:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 7007. [2022-07-14 06:04:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7005 states have (on average 1.1117773019271948) internal successors, (7788), 7006 states have internal predecessors, (7788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 7788 transitions. [2022-07-14 06:04:45,923 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 7788 transitions. Word has length 130 [2022-07-14 06:04:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:45,923 INFO L495 AbstractCegarLoop]: Abstraction has 7007 states and 7788 transitions. [2022-07-14 06:04:45,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.292134831460674) internal successors, (382), 90 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 7788 transitions. [2022-07-14 06:04:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-14 06:04:45,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:45,930 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:45,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-07-14 06:04:46,155 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:04:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:46,155 INFO L85 PathProgramCache]: Analyzing trace with hash -807702295, now seen corresponding path program 5 times [2022-07-14 06:04:46,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:46,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106039807] [2022-07-14 06:04:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:46,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 12 proven. 305 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:04:46,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:46,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106039807] [2022-07-14 06:04:46,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106039807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967622949] [2022-07-14 06:04:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:04:46,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:46,542 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:46,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-14 06:04:46,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-14 06:04:46,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:46,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-14 06:04:46,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:46,805 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:46,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:04:47,345 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 [2022-07-14 06:04:47,408 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:47,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-14 06:04:47,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-14 06:04:48,266 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:04:48,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-07-14 06:04:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 103 proven. 221 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:04:49,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:49,774 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:49,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:04:49,782 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:49,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:04:49,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:04:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 16 proven. 302 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:04:50,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967622949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:50,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:50,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 27] total 68 [2022-07-14 06:04:50,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023420959] [2022-07-14 06:04:50,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-14 06:04:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-14 06:04:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4336, Unknown=0, NotChecked=0, Total=4556 [2022-07-14 06:04:50,885 INFO L87 Difference]: Start difference. First operand 7007 states and 7788 transitions. Second operand has 68 states, 68 states have (on average 4.8088235294117645) internal successors, (327), 68 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:53,102 INFO L93 Difference]: Finished difference Result 8603 states and 9535 transitions. [2022-07-14 06:04:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-14 06:04:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.8088235294117645) internal successors, (327), 68 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-07-14 06:04:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:53,106 INFO L225 Difference]: With dead ends: 8603 [2022-07-14 06:04:53,106 INFO L226 Difference]: Without dead ends: 5963 [2022-07-14 06:04:53,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=529, Invalid=8213, Unknown=0, NotChecked=0, Total=8742 [2022-07-14 06:04:53,107 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 654 mSDsluCounter, 3825 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 3923 SdHoareTripleChecker+Invalid, 4556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1766 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:53,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 3923 Invalid, 4556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2762 Invalid, 0 Unknown, 1766 Unchecked, 1.1s Time] [2022-07-14 06:04:53,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5963 states. [2022-07-14 06:04:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5963 to 4168. [2022-07-14 06:04:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4166 states have (on average 1.1212193951032166) internal successors, (4671), 4167 states have internal predecessors, (4671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 4671 transitions. [2022-07-14 06:04:53,152 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 4671 transitions. Word has length 130 [2022-07-14 06:04:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:53,153 INFO L495 AbstractCegarLoop]: Abstraction has 4168 states and 4671 transitions. [2022-07-14 06:04:53,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.8088235294117645) internal successors, (327), 68 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 4671 transitions. [2022-07-14 06:04:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-14 06:04:53,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:53,157 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:53,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:53,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:53,382 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:04:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash 865906500, now seen corresponding path program 12 times [2022-07-14 06:04:53,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:53,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932208225] [2022-07-14 06:04:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:53,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:53,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:53,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932208225] [2022-07-14 06:04:53,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932208225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:53,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320711663] [2022-07-14 06:04:53,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:04:53,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:53,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:53,949 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:53,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-14 06:04:54,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-14 06:04:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-14 06:04:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:54,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:04:54,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:04:54,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:04:57,089 INFO L356 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2022-07-14 06:04:57,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2022-07-14 06:04:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:57,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:58,272 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2054 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2054) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select v_ArrVal_2054 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse0 (select .cse2 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (or (= 0 .cse0) (not (= .cse1 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (not (= .cse1 (select .cse2 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= .cse1 .cse0)))))) is different from false [2022-07-14 06:04:58,278 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:58,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 67 [2022-07-14 06:04:58,300 INFO L356 Elim1Store]: treesize reduction 45, result has 35.7 percent of original size [2022-07-14 06:04:58,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 124 [2022-07-14 06:04:58,342 INFO L356 Elim1Store]: treesize reduction 32, result has 47.5 percent of original size [2022-07-14 06:04:58,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 90 [2022-07-14 06:04:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 63 proven. 283 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:59,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320711663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:59,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:59,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34, 35] total 85 [2022-07-14 06:04:59,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561545616] [2022-07-14 06:04:59,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:59,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-14 06:04:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-14 06:04:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=6613, Unknown=1, NotChecked=164, Total=7140 [2022-07-14 06:04:59,441 INFO L87 Difference]: Start difference. First operand 4168 states and 4671 transitions. Second operand has 85 states, 85 states have (on average 3.8705882352941177) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:01,037 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse1 (select .cse2 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (or (not (= .cse0 .cse1)) (not (= .cse0 (select .cse2 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse0)) (= .cse1 0)))) .cse3 (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (= (+ (- 2) |c_ULTIMATE.start_main_~i~0#1|) 0) (forall ((v_ArrVal_2054 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2054) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse5 (select v_ArrVal_2054 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse4 (select .cse6 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (or (= 0 .cse4) (not (= .cse5 (select .cse6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (not (= .cse5 (select .cse6 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= .cse5 .cse4)))))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (or (and .cse3 (= |c_ULTIMATE.start_main_~length1~0#1| 1)) (and (= 3 |c_ULTIMATE.start_main_~length1~0#1|) .cse3) (and .cse3 (= 7 |c_ULTIMATE.start_main_~length1~0#1|))))) is different from false [2022-07-14 06:05:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:01,417 INFO L93 Difference]: Finished difference Result 5097 states and 5660 transitions. [2022-07-14 06:05:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-14 06:05:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.8705882352941177) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 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 131 [2022-07-14 06:05:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:01,421 INFO L225 Difference]: With dead ends: 5097 [2022-07-14 06:05:01,421 INFO L226 Difference]: Without dead ends: 4988 [2022-07-14 06:05:01,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=658, Invalid=12230, Unknown=2, NotChecked=450, Total=13340 [2022-07-14 06:05:01,422 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 202 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:01,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 2456 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1216 Invalid, 0 Unknown, 274 Unchecked, 0.5s Time] [2022-07-14 06:05:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2022-07-14 06:05:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4959. [2022-07-14 06:05:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4957 states have (on average 1.1139802299778092) internal successors, (5522), 4958 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 5522 transitions. [2022-07-14 06:05:01,452 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 5522 transitions. Word has length 131 [2022-07-14 06:05:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:01,452 INFO L495 AbstractCegarLoop]: Abstraction has 4959 states and 5522 transitions. [2022-07-14 06:05:01,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.8705882352941177) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 5522 transitions. [2022-07-14 06:05:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-14 06:05:01,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:01,456 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:01,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:01,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-14 06:05:01,656 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:05:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash 377802238, now seen corresponding path program 11 times [2022-07-14 06:05:01,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:01,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793946395] [2022-07-14 06:05:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:01,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 41 proven. 455 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:05:02,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:02,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793946395] [2022-07-14 06:05:02,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793946395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:02,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810899401] [2022-07-14 06:05:02,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:05:02,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:02,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:02,100 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:02,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-14 06:05:02,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-14 06:05:02,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:02,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:05:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:02,343 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:02,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:05:02,882 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 [2022-07-14 06:05:03,787 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:03,787 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 [2022-07-14 06:05:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 120 proven. 376 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:05:03,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:05,102 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 [2022-07-14 06:05:05,104 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 [2022-07-14 06:05:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 153 proven. 343 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:05:06,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810899401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:06,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:06,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2022-07-14 06:05:06,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107564757] [2022-07-14 06:05:06,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:06,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-14 06:05:06,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-14 06:05:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=6325, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 06:05:06,001 INFO L87 Difference]: Start difference. First operand 4959 states and 5522 transitions. Second operand has 83 states, 83 states have (on average 4.530120481927711) internal successors, (376), 83 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:10,220 INFO L93 Difference]: Finished difference Result 8459 states and 9363 transitions. [2022-07-14 06:05:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-14 06:05:10,221 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.530120481927711) internal successors, (376), 83 states have internal predecessors, (376), 0 states have call successors, (0), 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 133 [2022-07-14 06:05:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:10,228 INFO L225 Difference]: With dead ends: 8459 [2022-07-14 06:05:10,228 INFO L226 Difference]: Without dead ends: 8300 [2022-07-14 06:05:10,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1318, Invalid=14938, Unknown=0, NotChecked=0, Total=16256 [2022-07-14 06:05:10,229 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1607 mSDsluCounter, 4988 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 5137 SdHoareTripleChecker+Invalid, 7346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1783 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:10,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1607 Valid, 5137 Invalid, 7346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 5475 Invalid, 0 Unknown, 1783 Unchecked, 2.1s Time] [2022-07-14 06:05:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2022-07-14 06:05:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 5959. [2022-07-14 06:05:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5959 states, 5957 states have (on average 1.1144871579654188) internal successors, (6639), 5958 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5959 states to 5959 states and 6639 transitions. [2022-07-14 06:05:10,302 INFO L78 Accepts]: Start accepts. Automaton has 5959 states and 6639 transitions. Word has length 133 [2022-07-14 06:05:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:10,302 INFO L495 AbstractCegarLoop]: Abstraction has 5959 states and 6639 transitions. [2022-07-14 06:05:10,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.530120481927711) internal successors, (376), 83 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5959 states and 6639 transitions. [2022-07-14 06:05:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-14 06:05:10,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:10,305 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:10,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:10,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:10,508 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:05:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1138351353, now seen corresponding path program 13 times [2022-07-14 06:05:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448658646] [2022-07-14 06:05:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 326 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:10,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:10,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448658646] [2022-07-14 06:05:10,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448658646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:10,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432454449] [2022-07-14 06:05:10,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:05:10,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:10,737 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:10,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-14 06:05:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:05:10,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:10,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:05:10,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:05:10,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 66 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:11,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 91 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:12,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432454449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:12,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:12,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2022-07-14 06:05:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745136624] [2022-07-14 06:05:12,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:12,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:05:12,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:05:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:05:12,349 INFO L87 Difference]: Start difference. First operand 5959 states and 6639 transitions. Second operand has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:13,965 INFO L93 Difference]: Finished difference Result 11881 states and 13267 transitions. [2022-07-14 06:05:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-14 06:05:13,965 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-07-14 06:05:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:13,975 INFO L225 Difference]: With dead ends: 11881 [2022-07-14 06:05:13,975 INFO L226 Difference]: Without dead ends: 11881 [2022-07-14 06:05:13,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1161, Invalid=5159, Unknown=0, NotChecked=0, Total=6320 [2022-07-14 06:05:13,976 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 981 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:13,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 1862 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 06:05:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2022-07-14 06:05:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 6470. [2022-07-14 06:05:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6470 states, 6468 states have (on average 1.1151824366110081) internal successors, (7213), 6469 states have internal predecessors, (7213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6470 states to 6470 states and 7213 transitions. [2022-07-14 06:05:14,055 INFO L78 Accepts]: Start accepts. Automaton has 6470 states and 7213 transitions. Word has length 135 [2022-07-14 06:05:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:14,056 INFO L495 AbstractCegarLoop]: Abstraction has 6470 states and 7213 transitions. [2022-07-14 06:05:14,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 6470 states and 7213 transitions. [2022-07-14 06:05:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-14 06:05:14,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:14,060 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:14,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:14,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:14,266 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:05:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1900716246, now seen corresponding path program 12 times [2022-07-14 06:05:14,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:14,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827732908] [2022-07-14 06:05:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:05:14,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827732908] [2022-07-14 06:05:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827732908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587987140] [2022-07-14 06:05:14,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:05:14,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:14,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:14,701 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:14,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-14 06:05:15,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-14 06:05:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:15,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:05:15,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:15,497 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 [2022-07-14 06:05:15,831 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 [2022-07-14 06:05:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:05:15,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:16,020 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 [2022-07-14 06:05:16,021 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 [2022-07-14 06:05:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:05:16,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587987140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:16,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:16,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 49 [2022-07-14 06:05:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588680841] [2022-07-14 06:05:16,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:16,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:05:16,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:05:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2206, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:05:16,246 INFO L87 Difference]: Start difference. First operand 6470 states and 7213 transitions. Second operand has 49 states, 49 states have (on average 4.673469387755102) internal successors, (229), 49 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:18,763 INFO L93 Difference]: Finished difference Result 8198 states and 9075 transitions. [2022-07-14 06:05:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:05:18,763 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.673469387755102) internal successors, (229), 49 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-07-14 06:05:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:18,770 INFO L225 Difference]: With dead ends: 8198 [2022-07-14 06:05:18,770 INFO L226 Difference]: Without dead ends: 7507 [2022-07-14 06:05:18,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=511, Invalid=4891, Unknown=0, NotChecked=0, Total=5402 [2022-07-14 06:05:18,772 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 970 mSDsluCounter, 5178 mSDsCounter, 0 mSdLazyCounter, 3968 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 5391 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:18,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 5391 Invalid, 4376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3968 Invalid, 0 Unknown, 331 Unchecked, 1.6s Time] [2022-07-14 06:05:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2022-07-14 06:05:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 6217. [2022-07-14 06:05:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6217 states, 6215 states have (on average 1.1142397425583266) internal successors, (6925), 6216 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6217 states to 6217 states and 6925 transitions. [2022-07-14 06:05:18,873 INFO L78 Accepts]: Start accepts. Automaton has 6217 states and 6925 transitions. Word has length 139 [2022-07-14 06:05:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:18,873 INFO L495 AbstractCegarLoop]: Abstraction has 6217 states and 6925 transitions. [2022-07-14 06:05:18,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.673469387755102) internal successors, (229), 49 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6217 states and 6925 transitions. [2022-07-14 06:05:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-14 06:05:18,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:18,888 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:18,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-14 06:05:19,107 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:05:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2041039411, now seen corresponding path program 6 times [2022-07-14 06:05:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339311232] [2022-07-14 06:05:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:05:19,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339311232] [2022-07-14 06:05:19,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339311232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438007902] [2022-07-14 06:05:19,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:05:19,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:19,480 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:19,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-14 06:05:19,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-14 06:05:19,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:19,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-14 06:05:19,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:19,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:20,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:05:20,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:05:20,726 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:05:20,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:05:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 18 proven. 369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:05:20,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:21,241 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2293 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2293) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-14 06:05:21,246 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:21,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:05:21,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:21,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:05:21,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:05:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 13 proven. 374 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:05:21,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438007902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:21,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:21,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 26] total 50 [2022-07-14 06:05:21,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610301248] [2022-07-14 06:05:21,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:21,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-14 06:05:21,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:21,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-14 06:05:21,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2211, Unknown=1, NotChecked=94, Total=2450 [2022-07-14 06:05:21,553 INFO L87 Difference]: Start difference. First operand 6217 states and 6925 transitions. Second operand has 50 states, 50 states have (on average 5.0) internal successors, (250), 50 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:22,438 INFO L93 Difference]: Finished difference Result 8799 states and 9820 transitions. [2022-07-14 06:05:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:05:22,439 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.0) internal successors, (250), 50 states have internal predecessors, (250), 0 states have call successors, (0), 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 141 [2022-07-14 06:05:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:22,445 INFO L225 Difference]: With dead ends: 8799 [2022-07-14 06:05:22,445 INFO L226 Difference]: Without dead ends: 6561 [2022-07-14 06:05:22,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 246 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=217, Invalid=3326, Unknown=1, NotChecked=116, Total=3660 [2022-07-14 06:05:22,446 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 100 mSDsluCounter, 2936 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:22,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 3027 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1069 Invalid, 0 Unknown, 444 Unchecked, 0.4s Time] [2022-07-14 06:05:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2022-07-14 06:05:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5629. [2022-07-14 06:05:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5629 states, 5627 states have (on average 1.1208459214501512) internal successors, (6307), 5628 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 6307 transitions. [2022-07-14 06:05:22,496 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 6307 transitions. Word has length 141 [2022-07-14 06:05:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:22,496 INFO L495 AbstractCegarLoop]: Abstraction has 5629 states and 6307 transitions. [2022-07-14 06:05:22,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.0) internal successors, (250), 50 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 6307 transitions. [2022-07-14 06:05:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-14 06:05:22,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:22,501 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:22,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-14 06:05:22,719 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:05:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash -323469660, now seen corresponding path program 17 times [2022-07-14 06:05:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:22,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851220904] [2022-07-14 06:05:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 414 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:23,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851220904] [2022-07-14 06:05:23,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851220904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730974151] [2022-07-14 06:05:23,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:05:23,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:23,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:23,245 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:23,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-14 06:05:23,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-14 06:05:23,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 06:05:23,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:23,557 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:23,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:05:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 481 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:24,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 481 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:25,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730974151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:25,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:25,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 74 [2022-07-14 06:05:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974877690] [2022-07-14 06:05:25,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:25,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-14 06:05:25,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-14 06:05:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=4567, Unknown=0, NotChecked=0, Total=5402 [2022-07-14 06:05:25,587 INFO L87 Difference]: Start difference. First operand 5629 states and 6307 transitions. Second operand has 74 states, 74 states have (on average 4.581081081081081) internal successors, (339), 74 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)